I'll be spending my next few days surfing the PHD2 forum. Thanks
toggle quoted messageShow quoted text
On 5/28/20 7:02 PM, Brian Valente
We're not so far apart on our setups:
i have an OAG with Lodestar that is 752 x 582 8.4u @840mm
Your camera has the TC-237 tracking CCD (657 x 495 pixels
at 7.4u) @ 1620mm focal length
yes of course you're imaging at 2x focal length (yes i'm
jealous :) ) but PHD also has noise reduction, star saturation
detection, minimum star size, etc. to eliminate erroneous star
selection. might be worth a visit to PHD forums?
i'll stop on this now haha
On Thu, May 28, 2020 at 4:01
PM Mojo Jones <mojo@...
Thanks for chiming in Brian! I'm sure much of my
difficulty comes from using the built-in off-axis guide
camera on my ST-4000XCM, so I don't have the privilege of a
wider-field guide scope. Quite often this past week I
haven't had a wide enough field to find a bright enough star
to peek up above the sky glow. PHD2 presents a gnarly grey
noisy field, and "auto select" latches onto something that's
often not a star at all.
I'd love to tweak PHD2 so it doesn't latch onto non-stars. I
built a bad pixel map.
On 5/28/2020 12:58 PM, Brian Valente wrote:
>>>My biggest bugaboo in these skies is finding a
suitable guide star. PHD2 will lock onto any clump of
noise and hunt around the sky trying to guide on it.
I'm not sure what issue you are having, but i image in the
san fernando valley (the worst) and i have no problems
finding guidestars, even with a simple lodestar x2. PHD
has a number of techniques and filters to rule out
non-stars for star selection, so i'm surprised you are
having these kinds of issues
you might consider posting your logs to the PHD forums for
On 5/28/2020 12:48 PM, Mojo Jones wrote:
My biggest bugaboo in these skies
is finding a suitable guide star. PHD2 will lock onto
any clump of noise and hunt around the sky trying to
guide on it.