solar filters
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Mike Shade
Curious as to what solar filters folks have found to be good...I was thinking of a Thousand Oaks glass filter for the 160 EDF...anyone have one for use with this scope...what size fits properly...?
Mike J. Shade: mshade@q.com Mike J. Shade Photography:
In War: Resolution In Defeat: Defiance In Victory: Magnanimity In Peace: Goodwill Sir Winston Churchill Already, in the gathering dusk, a few of the stars are turning on their lights. Vega, the brightest one, is now dropping towards the west. Can it be half a year since I watched her April rising in the east? Low in the southwest Antares blinks a sad farwell to fall... Leslie Peltier, Starlight Nights
International Dark Sky Association: www.darksky.org
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Craig Anderson
A Herschel Wedge! Baader or Lunt. I've used them on my AP scopes with great success. The solar load on a quality refractor is no problem so long as the scope has front lens elements only. You'll get unbelievable views with your 160 and a wedge. Make sure to get a 2" model and to use additional ND filters for visual. The Baader comes as a kit with everything you need. Of course you can only use a wedge with a refractor! -Craig On Apr 5, 2016, at 11:41 PM, 'Mike Shade' mshade@q.com [ap-gto] <ap-gto@...> wrote:
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erik.pylyser@...
Hi, I'd suggest as a (cheaper) still-quite-good alternative: Two versions: one for visual, one for photography... The wedges are a bit better, but... be aware of the potential problem of backfocus with the wedges... check your system's focus distances before buying... ;-) Don't go for glass filters... Erik. From: "Craig craig@... [ap-gto]" To: ap-gto@... Sent: Wednesday, April 6, 2016 1:35:34 PM Subject: Re: [ap-gto] solar filters A Herschel Wedge! Baader or Lunt. I've used them on my AP scopes with great success. The solar load on a quality refractor is no problem so long as the scope has front lens elements only. You'll get unbelievable views with your 160 and a wedge. Make sure to get a 2" model and to use additional ND filters for visual. The Baader comes as a kit with everything you need. Of course you can only use a wedge with a refractor! -Craig
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Craig Anderson
Good point on the backfocus. Both my AP155 and 130 GTO have plenty of backfocus for my 2" Baader wedge. My previous AP130 f6 also had plenty of backfocus. TeleVue scopes I've had in the past did not have have enough backfocus for a 2" wedge but we're fine for a 1.25" one. Personally, I wouldn't use a 1.25" wedge with more that 4" of aperture. Craig On Apr 6, 2016, at 9:14 AM, erik.pylyser@... [ap-gto] <ap-gto@...> wrote:
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Mike Shade
Thanks...but a wedge would not allow any photography/imaging and is more than I want to spend on something that will not get used much.
Thank you Mike J. Shade: mshade@q.com Mike J. Shade Photography: mshadephotography.com In War: Resolution In Defeat: Defiance In Victory: Magnanimity In Peace: Goodwill Sir Winston Churchill Already, in the gathering dusk, a few of the stars are turning on their lights. Vega, the brightest one, is now dropping towards the west. Can it be half a year since I watched her April rising in the east? Low in the southwest Antares blinks a sad farwell to fall... Leslie Peltier, Starlight Nights International Dark Sky Association: <http://www.darksky.org/> www.darksky.org From: ap-gto@... [mailto:ap-gto@...] Sent: Wednesday, April 06, 2016 4:36 AM To: ap-gto@... Subject: Re: [ap-gto] solar filters A Herschel Wedge! Baader or Lunt. I've used them on my AP scopes with great success. The solar load on a quality refractor is no problem so long as the scope has front lens elements only. You'll get unbelievable views with your 160 and a wedge. Make sure to get a 2" model and to use additional ND filters for visual. The Baader comes as a kit with everything you need. Of course you can only use a wedge with a refractor! -Craig On Apr 5, 2016, at 11:41 PM, 'Mike Shade' mshade@q.com [ap-gto] <ap-gto@...> wrote: Curious as to what solar filters folks have found to be good...I was thinking of a Thousand Oaks glass filter for the 160 EDF...anyone have one for use with this scope...what size fits properly...? Mike J. Shade: mshade@q.com Mike J. Shade Photography: mshadephotography.com In War: Resolution In Defeat: Defiance In Victory: Magnanimity In Peace: Goodwill Sir Winston Churchill Already, in the gathering dusk, a few of the stars are turning on their lights. Vega, the brightest one, is now dropping towards the west. Can it be half a year since I watched her April rising in the east? Low in the southwest Antares blinks a sad farwell to fall... Leslie Peltier, Starlight Nights International Dark Sky Association: www.darksky.org <http://www.darksky.org/> |
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stlrvus
My Baader Herschel Wedge focuses on my Traveler, and have imaged with it.
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I was going to chime in as well saying that the Herschel wedge from Baader focused fine on my AP130EDT (same should be true for the 155EDF) and it comes in two forms one of which is 'P' i.e. Photographic. You need to be sure to get that one else it is just visual. Stuart On Wed, Apr 6, 2016 at 10:39 AM, jmagsaysay58@... [ap-gto] <ap-gto@...> wrote:
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Stuart Heggie |
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observe_m13
Huh? There is nothing better in my opinion. Really. The Baader Herschel Wedge is THE solar accessory for white light and Ca imaging.
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---In ap-gto@..., <mshade@...> wrote : Thanks...but a wedge would not allow any photography/imaging and is more than I want to spend on something that will not get used much. Thank you Mike J. Shade: mshade@... Mike J. Shade Photography: mshadephotography.com In War: Resolution In Defeat: Defiance In Victory: Magnanimity In Peace: Goodwill Sir Winston Churchill Already, in the gathering dusk, a few of the stars are turning on their lights. Vega, the brightest one, is now dropping towards the west. Can it be half a year since I watched her April rising in the east? Low in the southwest Antares blinks a sad farwell to fall... Leslie Peltier, Starlight Nights International Dark Sky Association: <http://www.darksky.org/> www.darksky.org From: ap-gto@... [mailto:ap-gto@...]
Sent: Wednesday, April 06, 2016 4:36 AM To: ap-gto@... Subject: Re: [ap-gto] solar filters A Herschel Wedge! Baader or Lunt. I've used them on my AP scopes with great success. The solar load on a quality refractor is no problem so long as the scope has front lens elements only. You'll get unbelievable views with your 160 and a wedge. Make sure to get a 2" model and to use additional ND filters for visual. The Baader comes as a kit with everything you need. Of course you can only use a wedge with a refractor! -Craig On Apr 5, 2016, at 11:41 PM, 'Mike Shade' mshade@... [ap-gto] <ap-gto@...> wrote: |
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Woody Schlom <woody@...>
Erik,
I
don't think back-focus distance will be a problem on a 160mm scope! It's
when you go with a short focal-length scope you run into back-focus
problems. And at least with the Baader, there's a "secret" way to gain
around 3/4" in back-focus distance -- you replace the Baader 2" Click-Lock with
Baader T2 threaded fittings.
Woody
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Woody Schlom <woody@...>
Mike,
What's
this about a wedge not allowing photography? Who/what gave you that
idea?
Of
course you can image with a wedge. In fact, Baader makes two versions of
their Herschel Wedge, the "V" version for visual, and the "P" version for
photography. The difference is the "P" version comes with more ND
filters. Cameras can take more brightness than our eyes, so in
the "P" version, Baader includes a couple of less-dense ND filters exclusively
for photography.
I'll
even go as far as saying Herschel Wedges are BETTER for imaging. So far as
I know, Herschel Wedges are the best for white-light solar viewing and
imaging. But yes, they're also the most expensive.
Also
note that the Baader Herschel Wedges come with the greenish Baader Continuum
filter. You'll have to spend an additional $100 or so to add a Continuum
filter to a Lunt wedge -- which seriously narrows the price difference between
the two brands.
Woody.
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Personally I have a Coronado 40mm filter set, a Daystar Quark, a mess
of Orion glass filters and a roll of Baader visual film.
The Coronado gives the best solar views, followed by the Quark,
followed by the glass filters and the film in last place.
I have tried
a wedge but do not own one. It seemed about on-par with the glass filters
to me. Christopher
Erickson From: ap-gto@... [mailto:ap-gto@...] Sent: Wednesday, April 06, 2016 3:14 AM To: ap-gto@... Subject: Re: [ap-gto] solar filters Hi,
I'd suggest as a (cheaper) still-quite-good alternative:
Two versions: one for visual, one for photography...
The wedges are a bit better, but... be aware of the potential problem of
backfocus with the wedges... check your system's focus distances before
buying... ;-)
Don't go for glass filters...
Erik.
From:
"Craig craig@... [ap-gto]"
To: ap-gto@... Sent: Wednesday, April 6, 2016 1:35:34 PM Subject: Re: [ap-gto] solar filters A Herschel Wedge! Baader or Lunt. I've used them on my AP scopes with great
success. The solar load on a quality refractor is no problem so long as
the scope has front lens elements only. You'll get unbelievable views with
your 160 and a wedge. Make sure to get a 2" model and to use additional ND
filters for visual. The Baader comes as a kit with everything you
need.
Of course you can only use a wedge with a
refractor!
-Craig
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Rodolphe Pineau <pineau@...>
I use to have a glass filter (not on a AP telescope but I don't think this is relevant to the current comparison).
Then I moved to a Lunt solar wedge. Here are 2 example taken with the same telescope (102 triplet APO): glass filter imaging : http://www.rti-zone.org/astro/moon_sun/900gto/sun/spots_1582_1579_1575.jpg Lunt wedge : http://www.rti-zone.org/astro/moon_sun/900gto/sun/Sun_partial_eclipse_2014_10_23_1.png I think the image speak for themselves. Regards, Rodolphe -- | Rodolphe Pineau RTI-Zone | | http://www.rti-zone.org/ | | Robotics / Unix / Mac OS X / Astronomy | |
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Mike Shade
For the money a wedge is going to cost versus the amount of use does not
seem a viable alternative. From: ap-gto@... [mailto:ap-gto@...] Sent: Wednesday, April 06, 2016 10:32 AM To: ap-gto@... Subject: RE: [ap-gto] solar filters Mike, What's this about a wedge not allowing photography? Who/what gave you that idea? Of course you can image with a wedge. In fact, Baader makes two versions of their Herschel Wedge, the "V" version for visual, and the "P" version for photography. The difference is the "P" version comes with more ND filters. Cameras can take more brightness than our eyes, so in the "P" version, Baader includes a couple of less-dense ND filters exclusively for photography. I'll even go as far as saying Herschel Wedges are BETTER for imaging. So far as I know, Herschel Wedges are the best for white-light solar viewing and imaging. But yes, they're also the most expensive. Also note that the Baader Herschel Wedges come with the greenish Baader Continuum filter. You'll have to spend an additional $100 or so to add a Continuum filter to a Lunt wedge -- which seriously narrows the price difference between the two brands. Woody. -----Original Message----- From: ap-gto@... [mailto:ap-gto@...] Sent: Wednesday, April 06, 2016 6:47 AM To: ap-gto@... Subject: RE: [ap-gto] solar filters Thanks...but a wedge would not allow any photography/imaging and is more than I want to spend on something that will not get used much. Thank you Mike J. Shade: mshade@q.com Mike J. Shade Photography: mshadephotography.com In War: Resolution In Defeat: Defiance In Victory: Magnanimity In Peace: Goodwill Sir Winston Churchill Already, in the gathering dusk, a few of the stars are turning on their lights. Vega, the brightest one, is now dropping towards the west. Can it be half a year since I watched her April rising in the east? Low in the southwest Antares blinks a sad farwell to fall... Leslie Peltier, Starlight Nights International Dark Sky Association: <http://www.darksky.org/> www.darksky.org From: ap-gto@... [mailto:ap-gto@...] Sent: Wednesday, April 06, 2016 4:36 AM To: ap-gto@... Subject: Re: [ap-gto] solar filters A Herschel Wedge! Baader or Lunt. I've used them on my AP scopes with great success. The solar load on a quality refractor is no problem so long as the scope has front lens elements only. You'll get unbelievable views with your 160 and a wedge. Make sure to get a 2" model and to use additional ND filters for visual. The Baader comes as a kit with everything you need. Of course you can only use a wedge with a refractor! -Craig On Apr 5, 2016, at 11:41 PM, 'Mike Shade' mshade@q.com [ap-gto] <ap-gto@...> wrote: Curious as to what solar filters folks have found to be good...I was thinking of a Thousand Oaks glass filter for the 160 EDF...anyone have one for use with this scope...what size fits properly...? Mike J. Shade: mshade@q.com Mike J. Shade Photography: mshadephotography.com In War: Resolution In Defeat: Defiance In Victory: Magnanimity In Peace: Goodwill Sir Winston Churchill Already, in the gathering dusk, a few of the stars are turning on their lights. Vega, the brightest one, is now dropping towards the west. Can it be half a year since I watched her April rising in the east? Low in the southwest Antares blinks a sad farwell to fall... Leslie Peltier, Starlight Nights International Dark Sky Association: www.darksky.org <http://www.darksky.org/> |
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erik.pylyser@...
Hi Woody... you're right on all fronts... ;-)... I was just being cautious towards potential buyers, to check their systems... I've used the Baader wedge on my AP155... but also on shorter focal lengths of other brands, and then - as you said - you need to work your way around the back-focus problems... ;-) Erik. From: "'Woody Schlom' woody@... [ap-gto]" To: ap-gto@... Sent: Wednesday, April 6, 2016 7:22:56 PM Subject: RE: [ap-gto] solar filters
Erik,
I
don't think back-focus distance will be a problem on a 160mm scope! It's
when you go with a short focal-length scope you run into back-focus
problems. And at least with the Baader, there's a "secret" way to gain
around 3/4" in back-focus distance -- you replace the Baader 2" Click-Lock with
Baader T2 threaded fittings.
Woody
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Wayne Hixson
Trying to come to focus with the Baader wedge and my ZWO/NW127is now. Think I'm about 2-3 mm away for prime focus. Can get there (barely) with my 2.5 and 5x PowerMates. Sent from Outlook Mobile
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Woody Schlom <woody@...>
Again,
by replacing the Baader 2" Click-Lock with their T2 threaded adapters, you can
gain almost 3/4" (~19mm) of back focus.
I've
got my Baader on an 80mm triplet refractor and can reach focus prime, and with
2x and 3x Barlows with my C-mount camera. For eyepieces, you can also use
the Astrosystems ultra low-profile 2" to 1.25" adapter which doesn't have an
external thumbscrew, but an internal setscrew. This lets you
slip eyepieces and Barlows deeper into the 2" Baader Click-Lock holder by
as much as an inch.
Woody
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Wayne Hixson
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On Wednesday, April 6, 2016, 1:25 PM, 'Woody Schlom' woody@... [ap-gto] wrote:
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Pawel Lancucki
Mike
Definitively the wedge. I have been using it on my AP152 and the views were terrific and I had no issue getting info focus with Canon. Views are better than baader Astrosolar. But if you just want to try, get the filer foil and make yourself a safe filter cell. Costs close to nothing compared to the scope. One point with wedge - keep the sun centered, otherwise it will heat the telescope elements. You may need to cover the scope from time to time to let the heat trap cool. Just follow the instructions. It is very safe. CS Pawel Lancucki |
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Woody Schlom <woody@...>
Yes,
it unscrews. Baader makes a special thin adapter ring that replaces
it. Then you screw standard T2 accessories into that
ring.
Woody
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Woody Schlom <woody@...>
Pawel,
I'm
curious about your comment to keep the Sun centered to prevent heating up the
telescope elements. Unless you've got a 4-element Petzvel design scope
where the rear elements are near focus, I don't see two or three elements at the
front of the scope where the image is totally unfocused, heating up -- whether
centered or not.
I'll
admit that my little 80mm triplet doesn't transmit nearly as much light and heat
as your big aperture scopes, but I've never heated mine up to the point where
the wedge was uncomfortable to touch -- even while imaging continuously for
7 hours with an ambient temperature of 98° F.
And I
sure don't understand why keeping the sun centered would decrease heat buildup
in the telescope lenses.
Woody
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