Canon 5D mkIII first astrophotography tests (from city)

Home · Register · Search · Software · Hosting · Software · Join Upload & Sell

FM Forum Rules
Canon SLRs, primes, and zooms lenses reviews

FM Forums \| Canon-mount SLRs \| Join Upload & Sell
end

SunBlack
Offline
• •
Upload & Sell: Off

p.1 #1 · Canon 5D mkIII first astrophotography tests (from city)

Canon 5D mkIII astro mod + Nikon 300/2.8 @ f/5.6 5x1m 6400iso + UHCS filter, no darks, sqm 18, camera temp. 32° .

This image is copyrighted by the owner

Canon 5D mkIII astro mod + Nikon 300/2.8 @ f/4 10x2m 1600iso + UHCS filter, no darks, crop & no resize, sqm 18.10 , camera temp. 32° .

This image is copyrighted by the owner

Aug 12, 2012 at 09:16 AM

Monito
Offline
• • • • •
Upload & Sell: Off

p.1 #2 · Canon 5D mkIII first astrophotography tests (from city)

SunBlack wrote:
Canon 5D mkIII astro mod + Nikon 300/2.8 @ f/5.6 5x1m 6400iso + UHCS filter, no darks, sqm 18, camera temp. 32° .

Canon 5D mkIII astro mod + Nikon 300/2.8 @ f/4 10x2m 1600iso + UHCS filter, no darks, crop & no resize, sqm 18.10 , camera temp. 32° .

Very interesting. Thank you for posting.

1) What is the "astro modification" used?

2) What does "5x1m" and "10x2m" mean in your data?

3) What does "no darks" mean?

4) What does "sqm 18" mean and how is it different from "sqm 18.10"?

5) Is that camera temperature in degrees Celsius?

Aug 12, 2012 at 06:18 PM

pinball_pw
Offline
• • • •
Upload & Sell: On

p.1 #3 · Canon 5D mkIII first astrophotography tests (from city)

I was wondering the same and did a little digging. Here is what I found:

1) The modification looks like the ones done by these folks here: http://www.sciencecenter.net/hutech/canon/
2) I think he means 5 frames at 1 minute each or 10 frames at 2 minutes each. These would then be stacked.
3) No dark frames to eliminated sensor hot spots. These are loaded in PS as a separate layer to exclude any "false stars".

- Paul

Aug 12, 2012 at 06:27 PM

Monito
Offline
• • • • •
Upload & Sell: Off

p.1 #4 · Canon 5D mkIII first astrophotography tests (from city)

Thanks! Makes sense.

Aug 12, 2012 at 06:51 PM

SunBlack
Offline
• •
Upload & Sell: Off

p.1 #5 · Canon 5D mkIII first astrophotography tests (from city)

4) http://www.unihedron.com/projects/darksky/

5) Celsius

Aug 12, 2012 at 10:12 PM

Monito
Offline
• • • • •
Upload & Sell: Off

p.1 #6 · Canon 5D mkIII first astrophotography tests (from city)

Cool!

... or not ... at 32 deg C

Aug 12, 2012 at 10:26 PM

dehowie
Offline
• • •
Upload & Sell: Off

p.1 #7 · Canon 5D mkIII first astrophotography tests (from city)

Out of interest could you stack the images without an equatorial mount or you do it by hand?

Aug 13, 2012 at 12:04 AM

end
FM Forums \| Canon-mount SLRs \| Join Upload & Sell end