Anyone ever had any success with a DSI

[Glenhuon (Bill)]

Lee, I've tried every setting known to man and it just won't show me anything darker than the moon in Nebulosity. It does show stars in Envision, at least I think they are stars, but are very strange shapes. I've fiddled with white and dark settings, changed exposures etc. Tracking on the mount isn't perfect, but is pretty good over 2 -3 minutes.Its very frustrating, as I used to get quite good images with my old Praktika film camera and no tracking.
Think I'll give the imaging bit a rest and go back to what got me interested in Astronomy in the first place, just looking

[Lee]

Maybe she's a dud???

[Glenhuon (Bill)]

Starting to think that too.

[Glenhuon (Bill)]

The wisdom of my good lady has prevailed and the DSI goes on the shelf for a while till I get organised for a dark sky night, and then I'll give it another go. Can't let a machine beat me

[mill (Martin)]

Originally Posted by Glenhuon

The wisdom of my good lady has prevailed and the DSI goes on the shelf for a while till I get organised for a dark sky night, and then I'll give it another go. Can't let a machine beat me

Dont give up.
I made this pic with the DSI colour and it looks actually pritty good.

[mill (Martin)]

Ps i did it in nebulosity and had the settings wrong so it came out black and white

[GrampianStars (Rob)]

Originally Posted by Lee

.... Mine comes to focus in the ED80 with a 35 mm extension piece, I'm sure it also will focus through diagonal.....

G'day Y'all
I need an extension piece at least 75mm for the ZS80
Any suggestions?
fully racked out focus is still 1" behind the scope
with a 2" diagonal in place I'm 1/2" short of focus fully racked in

[Karls48 (Karl)]

Hi Robert
You can get Guan Sheng Camera Adaptor fixed tube type for $29 from Andrews. It got male T tread on one end and female T tread on other. It is 68mm long including the tread.

[Lee]

If focus is only 25mm behind the scope why do you need 75mm???

[GrampianStars (Rob)]

Thanks Guys all sorted a great extension tube from Bintel Melbourne
https://www.bintelshop.com.au/Images/Stock/7082.jpg

[Glenhuon (Bill)]

At last, something that looks like an image from the DSI
Orion Nebula through the 150 F5 newtonian. 30 x 3sec frames stacked and minimal processing in Nebulosity.
No darks or flats, just the raw images.
3 secs was the longest I could take and not get too much trailing, have to work on the alignment.
I wasn't able to get much of the red colour in the image, I take it this requires longer exposures ?

[Lee]

Not bad! Good focus - you have really only got the core though - I think it is mostly whitish there.... the red will come! The DSI is very red sensitive, so you should get it.....
(You may want to restack though - I'm sure I can see the trapezium 3 times in your image???)

[Glenhuon (Bill)]

You're right Lee.
I got the first bit wrong, sleep first, process later

Bill

[Glenhuon (Bill)]

I changed to the 150 newt as I was getting elongated stars through the 80mm refractor. Think I've found the problem, loose mirror on the (El Cheapo) diagonal being shaken by the drive motor. Didn't think there would be enough vibration to cause that, but there you go. A dab of liquid nails between the mirror and the back cover should fix it. Adding a good one to the christmas list.
Becoming a bit more patient with the DSI, its not so bad really