4 main Nebs @ 135mm

astronobob (Bob) · #1 11-07-2021, 09:16 PM

Again from same night at Rathdowney after tweeking the tracker and mount.
Nice cross section fitting in the 135mm's field of view.

Added two crops at full pixel scale but still lacking 75% resolution considering the 200kb limit, quite a quality lens from Samyang.

Stats: Canon 6D II, 34 x 20 sec, ISO-3200, F2.4, SW StarTracker adapted on an Eq3 tripod.

Re-activated Astro-Bin - 5'ish Mb Link: https://www.astrobin.com/full/0fota0/0/

gregbradley · #2 12-07-2021, 08:09 AM

I like these widefield lens images. I have that lens as well but yet to try it out.
Fine focus can be tricky.

I like the wider image.

Greg.

astronobob (Bob) · #3 13-07-2021, 12:27 AM

Quote:

Originally Posted by gregbradley

I like these widefield lens images. I have that lens as well but yet to try it out.
Fine focus can be tricky.

I like the wider image.

Greg.

Widey's are cool at putting some targets into perpective.
Give your lens a go, 135 does not have any distortion like the very wide 20mm - 50mm etc & because its max apeture is F2 then is much easier to control colour aberations then the F1.4's too.
I do a 10x live view for focusing

rustigsmed (Russell) · #4 13-07-2021, 02:48 PM

nice work Bob, I would be happy with that - nice work.

russ

astronobob (Bob) · #5 14-07-2021, 12:46 PM

Quote:

Originally Posted by rustigsmed

nice work Bob, I would be happy with that - nice work.

russ

Cheers Russel, wide field are pretty cool, looking forward to other compositions with the milky way, trail an error I expect

Retrograde (Pete) · #6 15-07-2021, 01:11 PM

Looks good Bob.

I'm jealous of the field you were able to capture with your full-frame sensor - I captured only a bit over half of this with my crop sensor: https://www.iceinspace.com.au/forum/...d.php?t=191984

astronobob (Bob) · #7 15-07-2021, 03:00 PM

Cheers Pete

Whether crop or full frame, both have different advantages, ie: Crop for more detail and brings up many targets closer, for example the Mag Clouds, Eta or even Andromedia to name a few,,,
Full frame, wider field with higher dynamic range & lower noise, although the noise averages out of multi subs.
Good to compare the Composition also & Ironically envy work both ways

astronobob (Bob) · #8 16-07-2021, 03:17 PM

Thought to re-activate my Astro-Bin account.
Here is a 5'ish Mb image of above.

https://www.astrobin.com/full/0fota0/0/

RobF (Rob) · #9 18-07-2021, 11:07 AM

Nice work Bob. Didn't realise all those objects were laid out in almost a straight line like that. Wonderful to see "the big picture".
Definitely worth checking out the full files - small pics here don't do justice.

astronobob (Bob) · #10 19-07-2021, 07:14 PM

Quote:

Originally Posted by RobF

Nice work Bob. Didn't realise all those objects were laid out in almost a straight line like that. Wonderful to see "the big picture".
Definitely worth checking out the full files - small pics here don't do justice.

Cheers Rob, they all just a stones throw from each other. . Thanx for feedback on the full res. The accounts been de-activated for a few years but up and running again