Search found 120 matches

by einari
Tue Oct 24, 2017 6:22 am
Forum: Deepsky Images
Topic: M81 and M82 - 50 sec and Gain 400
Replies: 2
Views: 1614

Re: M81 and M82 - 50 sec and Gain 400

Guiding is no easy task with such large Newtonian and 1200mm fl.
You may need to up your guiding focal length (I sometimes used barlow lens - yes just the barlow lens screwed to camera nosepiece).
by einari
Mon Oct 23, 2017 5:35 pm
Forum: Deepsky Images
Topic: Problem with my images; can someone tell me what's wrong?
Replies: 3
Views: 1566

Re: Problem with my images; can someone tell me what's wrong

That's amp glow.
Start taking dark frames and bias - problem solved.
Also start taking flats too.
by einari
Wed Oct 18, 2017 11:00 am
Forum: Cameras
Topic: High precision time measurement
Replies: 5
Views: 1431

Re: High precision time measurement

Have you looked at competitors product ?
https://www.cyclopsoptics.com/cooled-ca ... s-coldmos/
by einari
Wed Oct 18, 2017 10:31 am
Forum: Cameras
Topic: ASI 1600MM-c AMP GLOW PROBLEM SOLVED
Replies: 5
Views: 2173

Re: ASI 1600MM-c AMP GLOW PROBLEM SOLVED

Can Sam (or someone from ZWO) explain how ZWO power supply is so different that it cures the amp glow problem ?
by einari
Sun Oct 15, 2017 7:04 pm
Forum: Cameras
Topic: Problems With Long Exposure
Replies: 2
Views: 870

Re: Problems With Long Exposure

Have you updated driver?
by einari
Sun Oct 15, 2017 6:49 am
Forum: Cameras
Topic: ASI 1600MM-c AMP GLOW PROBLEM SOLVED
Replies: 5
Views: 2173

Re: ASI 1600MM-c AMP GLOW PROBLEM SOLVED

Really!?
Power supply should not be cause or cure.
by einari
Fri Oct 06, 2017 4:01 pm
Forum: Cameras
Topic: ASI120MM-S and PHD2 Dark Library
Replies: 2
Views: 972

Re: ASI120MM-S and PHD2 Dark Library

Terve!

Some thoughts:
- try lowering USB traffic
- you are using USB3 port ? try different USB3 port
- latest drivers
- different USB cable
by einari
Sun Sep 17, 2017 3:10 pm
Forum: Cameras
Topic: collimation
Replies: 7
Views: 1849

Re: collimation

What John said.
So quite normal to have them.
You can clean them but sooner or later (sooner likely) they reappear.
So that's one good reason to take flats.
Btw, here's a tool to find out where they lie:
http://www.ccdware.com/resources/dust.cfm
by einari
Sat Sep 16, 2017 6:45 am
Forum: Cameras
Topic: collimation
Replies: 7
Views: 1849

Re: collimation

So you have exactly this? Backfocus (from mounting thread to focal plane): 59.7mm Anyway I just noticed this of Hyperstar Maximum Usable Sensor Size: 27mm Diagonal (APS Format) And ASI071 has 28. 4mm diagonal so your edge might not be perfect. That latter is dust mote. You just have to take flats to...
by einari
Thu Sep 14, 2017 6:13 am
Forum: Cameras
Topic: collimation
Replies: 7
Views: 1849

Re: collimation

That doesn't look like collimation /tilt issue.
Just sort out the hyperstar-camera distance (it's quite critical), and you're fine.