Go Back   IceInSpace > Beginners Start Here > Beginners Astrophotography
Register FAQ Calendar Today's Posts Search

Reply
 
Thread Tools Rate Thread
  #41  
Old 09-05-2012, 06:40 PM
EricB's Avatar
EricB (Eric)
Waiting for good seeing!

EricB is offline
 
Join Date: Jan 2012
Location: Adelaide
Posts: 645
Thanks Peter. I have thinking about going solar at some stage!
Reply With Quote
  #42  
Old 05-06-2012, 05:29 PM
EricB's Avatar
EricB (Eric)
Waiting for good seeing!

EricB is offline
 
Join Date: Jan 2012
Location: Adelaide
Posts: 645
The DMK41 has arrived after 2 months waiting (it was out of stock).

I only managed to use it once, 3 days ago, most as a test than for a serious imaging session, and here is the result of my first attempt on the Moon in low resolution (Tycho is in the bottom right hand corner).

The image was captured just ahead of some bad weather. The seeing was very bad (possibly the worst I have experienced so far), but I had to have a go. The Moon was coming in an out of cloud before dusk, between the branches of a large tree. Not ideal.

The scope wasn't aligned (it was still daylight) and I used the manual tracking. The AVI was only 100 frames. The DMK was used through ShapCap as I didn't have time to upload IC Capture which came with the camera.

The AVI was processed in Registrax 6.

I must say, I am a bit disappointed with the resulting picture (don't tell 2stroke!). I find it grainy, flat and lacking definition, especially compared with those taken with my old Microsoft VX3000 webcam. I will have to wait for better seeing conditions to try it properly. I like the subtle tomes though which I didn't quite get with the webcam.

I also noticed that I had dark spots on the AVI. It seems that it's dust particles on the chip cover. Can it be cleaned with a cotton bud (I don't have any air blower)?

Let me know what you think and how I could improve future AVIs.

Cheers,

Eric
Attached Thumbnails
Click for full-size image (PIXLR wave2&3_ 2_06_2012 5_32_12 PM (Small).jpg)
19.2 KB30 views
Reply With Quote
  #43  
Old 05-06-2012, 07:10 PM
Poita (Peter)
Registered User

Poita is offline
 
Join Date: Jun 2011
Location: NSW Country
Posts: 3,586
The graininess is as a result of the seeing. Turn the gain down to zero for the next lunar session and you will be much happier with the results.
Reply With Quote
  #44  
Old 05-06-2012, 08:25 PM
2stroke's Avatar
2stroke (Jay)
The devil's advocate

2stroke is offline
 
Join Date: Jul 2011
Posts: 816
Use air in a can designed for cameras/electronics aka air duster Eric. Hold the can upright and give is a quick burst to clear nozzle of any liquid propellant, then keep it upright a quick burst about 150mm away from the sensor. If the dust still sticks use a sensor swab or get a sensor brush, i use make-up applicators which are of very soft foam for oils and stubberen dust and lightly sweep it off. This method maybe wrong but lol i don't own a $7k camera, and i have never left any scratches in any of my sensors. If you google dslr lens/sensor cleaning you will find a ton of info and methods.

With your camera and low res how about making a mosaic out of highly magnified images. Turning the gain down will help out with noise and you can increase exposure to compensate. Lol i'am far from being an expert and would say of novice if that 1 more thing is to check out your codec and that your using a lossless, this will give you the best image possible. If your using a compression codec then you will pull higher fps but the images are like jpeg vs raw/tiff. If the seeing is bad by that i mean air turbulence drop back the res and crack the FPS up, it will give you a chance to get some clear shoots in the avi though more gain maybe needed.
Lol things never go right first time around haha, gl to your next session and do some googling on your dmk41 to get others tips and wisdom.
Reply With Quote
  #45  
Old 06-06-2012, 08:58 AM
EricB's Avatar
EricB (Eric)
Waiting for good seeing!

EricB is offline
 
Join Date: Jan 2012
Location: Adelaide
Posts: 645
Thanks Peter and Jay for the tips.

Jay, as far as codec and video format are concerned, I only have Y800 and AVI available. So I don't have any other option.

Cheers,

Eric
Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +10. The time is now 08:17 AM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Advertisement
Bintel
Advertisement