DSI Pro Mono Pics Comments Please

[Aster]

Had another go at the same objects I posted last time.

Hi Lee, any better?

DSI Pro, Envisage, Deep Space, .tiff

NGC 104 seems much better with 38x4sec. unguided

NGC 2070, I like the swirls of the nebulosity, but not to keen on the central cluster. the 20x30sec. exposures are also unguided.

Would really like some comments good or bad.

Have used DeepSkyStacker 3.0.1 and found it excellent and easy to use.

[Ric]

Hi Alexander, great images, it looks like you are getting things sorted out now with the DSI. The nebulosity in NGC2070 has been captured very nicely.

The only thing I would suggest is a bit more fine focussing to sharpen it up a bit, do you use a Hartmann mask or similar?

Cheers

[iceman (Mike)]

I was going to say focus as well.. and man, the FOV is tight. What scope are you using it on?

[Tamtarn]

Great images Alexander, they are up there with the best I've seen from a DSI Pro recently.

A great improvement from the first post of these images, you seem to be grabbing hold of the learning curve using DSI Pro very well.

Slight focus adjustment will make these images super.

[Lee]

Nice work.... you are progressing really well - Tuc47 looks great.... Tarantula good too - probably a bit soft with focus though.
How are you focusing??

[Aster]

Originally Posted by Lee

Nice work.... you are progressing really well - Tuc47 looks great.... Tarantula good too - probably a bit soft with focus though.
How are you focusing??

Thanks

Hardman Mask, 3rd-4th mag. star. Reading glasses. Peering intently at monitor

What else is there around which doesn't cost money for us poor pensioners

Haven't looked at Nebulosity as yet.

[Aster]

Thanks Ric, Mike and Tamtarn

You all keep commenting on focus. I use a Hardman mask, have a reasonable quality 15" Widescreen LCD monitor, HP/Compaq, reading glasses 9 month old, don't know what else to do.

Must have another look in constructing a KnifeEdge Focuser.

Mike

re tight FOV, I think the size of the CCD chip in the DSI Pro is the culprit in that. It's not like in the Canon At present using a 250mm x 1530mm FL Newtonian. Even 30 years ago with a 12.5" F6 and 35mm film the FOV was much greater if I remember rightly.

Must talk to father Xmas re a Canon Camera

[Alchemy (Clive)]

Originally Posted by Aster

NGC 2070, I like the swirls of the nebulosity, but not to keen on the central cluster.

Would really like some comments good or bad.

hmmm... i will have the removalists zip in and relocate that cluster for you... someone obviously dropped it by accident.

seriously though youre pics are ok, i dont know your level of experience so its hard to critique. It may be primitive but i use diffraction spikes to check my focus, pick a bight star and make them as long and tight as possible.... it works for me.

[Aster]

Originally Posted by Alchemy

seriously though youre pics are ok, i dont know your level of experience so its hard to critique. It may be primitive but i use diffraction spikes to check my focus, pick a bight star and make them as long and tight as possible.... it works for me.

In CCD imaging just about zero. Started about 4 weeks ago. In Deep Space Photography quite a bit, but that was 30 years ago when I used 35mm film, cooked it, backed it, froze it, force developed it etc. Also then I used a home made knife edge focuser as the distance from the film carrier rails to the front mounting point of a SLR was easily measured with a micrometer. Not quite as easy with a CCD imager.

Yes, I try to get the thinnest sharpest diffraction spikes too when using a Hardman Mask. Must be my eyesight

[Dr Nick (Nick)]

Focus looks a bit off but other than that they're great!