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AR2740 with Bobs filters

Posted: Sun May 05, 2019 8:51 pm
by RodAstro
I have finally got an image I am pleased with using Bobs ebay filters.
The seeing was bad and I only got 30 mins before the sun hit next doors house.
The big problem I have had is vertical lines caused by the QHY5II-M seems a big problem with this camera.
So I orientated the image that it would drift across the lines with the drive motor speeded up and then when staked the lines will be in different places on the final image and they will not stack. I can then use Registax wavelets to bring out some detail. This worked a treat.

Not as good as a Quark but does work so now a Quark and D-ERF is next on my list when I have passed that past the boss :lol:

The image was taken with my Carl Zeiss Jana 150mm f15 Coude stopped down to 110mm f20.
Th filter system uses a 50mm UV/IR, 630 Red, Bobs blocker 25mm, Bobs (etalon) filter, KG3, Bobs second (etalon) filter.
No collimators or telecentric.
Camera QHY5II-M
Image is a stack of 20 frames 800x600 from 1000 at 25 fps using EZPlanetary, Staked with AutoStakkert, Registak Waves, Ps cs6 to finish.

Re: AR2740 with Bobs filters

Posted: Mon May 06, 2019 9:17 am
by marktownley
Missed this one! Nice shot.

Re: AR2740 with Bobs filters

Posted: Mon May 06, 2019 1:01 pm
by RodAstro
Thanks Mark
For a while I never thought the filters were ever going to work.
But now I can see something I have the solar bug.
When I had one of the first PSTs I always thought about ripping it apart and was sure it would work but there was not enough info back then no one had done it.
What I have learnt from this project is that aperture beats f ratio with these filters, f30 is not needed, it works well at f15 when the seeing is good.
Also the more optics the more problems, keep it simple.
Next will be a Quark combo and hopefully a Baader D-erf then I may catch you up.
Cheers

Re: AR2740 with Bobs filters

Posted: Tue May 07, 2019 8:44 am
by Montana
Nice image Rod, looks like you put a great deal of effort into this :hamster: :bow

Alexandra

Re: AR2740 with Bobs filters

Posted: Tue May 07, 2019 6:42 pm
by RodAstro
Thanks Alexandra
yes it has been a lot of work but interesting
It also works on proms quite well

Re: AR2740 with Bobs filters

Posted: Tue May 07, 2019 7:37 pm
by marktownley
Nice addition with the proms

Re: AR2740 with Bobs filters

Posted: Wed May 08, 2019 5:06 am
by MAURITS
Well done Rod.