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Archive 2010Moon By Lens (100% crops)
p.10 #2Moon By Lens (100% crops)
That's still very good but whoa, the 18MP and the APS-C crop factor really makes that huge! Bigger that I thought anyway... About three times bigger. :o
Feb 16, 2011 at 06:07 PM
p.10 #3Moon By Lens (100% crops)
denoir wrote:
I agree that shots (crops) of the moon tell a lot about the quality of the lens.
The Zeiss 100 MP is for instance a very sharp lens:
Full image:
http://peltarion.eu/img/moon.jpg
100% crop:
http://peltarion.eu/img/moon2.jpg
Ok, sorry, I'll go away now
THIS>Just made me spit tea over my keyboard.
I agree that shots (crops) of the moon tell a lot about the quality of the lens.
The Zeiss 100 MP is for instance a very sharp lens:
Full image:
http://peltarion.eu/img/moon.jpg
100% crop:
http://peltarion.eu/img/moon2.jpg
Ok, sorry, I'll go away now
THIS>Just made me spit tea over my keyboard.
Feb 16, 2011 at 06:19 PM
p.10 #4Moon By Lens (100% crops)
meehzhzh...Pentax 645 600mm meamssfdmsdmf Canon 1.4 teleconverter....lmwaerlkamse....some of added contrast in DPP to bring it back to life, some USM...
Cropped to square mwemrwlekr.....
EOS 5DII, uh..
Shooting Mode Manual Exposure
Tv( Shutter Speed ) 1/60
Av( Aperture Value ) 0.0 (f/11 I think?)
ISO Speed 100
Image Size 5616x3744
http://img638.imageshack.us/img638/3995/webzorz.jpg
Edited on Feb 17, 2011 at 01:46 AM · View previous versions
Cropped to square mwemrwlekr.....
EOS 5DII, uh..
Shooting Mode Manual Exposure
Tv( Shutter Speed ) 1/60
Av( Aperture Value ) 0.0 (f/11 I think?)
ISO Speed 100
Image Size 5616x3744
http://img638.imageshack.us/img638/3995/webzorz.jpg
Edited on Feb 17, 2011 at 01:46 AM · View previous versions
Feb 17, 2011 at 01:28 AM
p.10 #6Moon By Lens (100% crops)
http://img202.imageshack.us/img202/6488/100percent.jpg
That's pretty much 1:1, I think....100%. I think I leaned too heavily on the USM, to get some better definition. Our air in LA is polluted, don't you know!
(sorry if I am screwing over the thread here, Bifurcator, with my rambling ways!)
That's pretty much 1:1, I think....100%. I think I leaned too heavily on the USM, to get some better definition. Our air in LA is polluted, don't you know!
(sorry if I am screwing over the thread here, Bifurcator, with my rambling ways!)
Feb 17, 2011 at 01:42 AM
p.10 #7Moon By Lens (100% crops)
naw, it's all good bro! And that's still pretty exceptional for 100%! One of the best in the thread so far! Nice!
Feb 17, 2011 at 01:47 AM
p.10 #8Moon By Lens (100% crops)
Nice work everyone - so glad to see some of that great old glass getting used.
R.H. - great use of the FD's - I've considered investing in some of the FD longs many times - one of these days.
R.H. - great use of the FD's - I've considered investing in some of the FD longs many times - one of these days.
Feb 17, 2011 at 01:42 PM
p.10 #9Moon By Lens (100% crops)
RH, I would love to see a 100% crop of that and see a pic of what your lens looks like. 
sirimiri, yeah that last one looks like it's the 100%.
Here's my processed image of the RAW you sent me:
http://tesselator.gpmod.com/Images/_Astronomy/Dantes_View645Pentax600-1_4xTC_14.jpg
Hope the beers were nice!
BTW, is this the lens you used?
http://img265.imageshack.us/img265/6950/pentax645n12140710mbpr4.jpg
What a cool looking lens! Looks like it's sharp for birding too: http://forums.steves-digicams.com/pentax-lenses/133802-645-pentax-lens-viable-option.html
sirimiri, yeah that last one looks like it's the 100%.
Here's my processed image of the RAW you sent me:http://tesselator.gpmod.com/Images/_Astronomy/Dantes_View645Pentax600-1_4xTC_14.jpg
Hope the beers were nice!
BTW, is this the lens you used?
http://img265.imageshack.us/img265/6950/pentax645n12140710mbpr4.jpg
What a cool looking lens! Looks like it's sharp for birding too: http://forums.steves-digicams.com/pentax-lenses/133802-645-pentax-lens-viable-option.html
Feb 17, 2011 at 09:47 PM
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p.10 #10Moon By Lens (100% crops)
i have never understood what is meant by 100% crop.
Feb 17, 2011 at 11:35 PM
p.10 #11Moon By Lens (100% crops)
If you do not scale it and you crop it then it's a "100% crop". It's a way viewing some part of the image at "actual size" - 1:1 pixel ratio.
Feb 17, 2011 at 11:44 PM
p.10 #12Moon By Lens (100% crops)
Bifurcator wrote:
BTW, is this the lens you used?
http://img265.imageshack.us/img265/6950/pentax645n12140710mbpr4.jpg
What a cool looking lens! Looks like it's sharp for birding too:
That's the lens. The carrying handle is a cool idea but adds lots of weight and frankly, bulks it up when you place it in a backpack.
In that image above, the 128mm (!) OEM protective Pentax filter is missing. The manual states: "...the filter is designed for part of the optical system, it is advisable to keep it on all the time."
Another great feature is the rotating portion of the lens tube. You don't rotate the barrel through the collar, you only twist the rear tube/camera through 360 degrees.
BTW, is this the lens you used?
http://img265.imageshack.us/img265/6950/pentax645n12140710mbpr4.jpg
What a cool looking lens! Looks like it's sharp for birding too:
That's the lens. The carrying handle is a cool idea but adds lots of weight and frankly, bulks it up when you place it in a backpack.
In that image above, the 128mm (!) OEM protective Pentax filter is missing. The manual states: "...the filter is designed for part of the optical system, it is advisable to keep it on all the time."
Another great feature is the rotating portion of the lens tube. You don't rotate the barrel through the collar, you only twist the rear tube/camera through 360 degrees.
Feb 19, 2011 at 04:32 PM
p.10 #13Moon By Lens (100% crops)
Yeah, several lenses I have have a rear filter and all of them say that "it's part of the optical formula" but in my tests it does nothing other than add internal reflections. In both the FD 300/2.8L and the FD 300/4L for example I can see it plainly. If I set my camera to spot metering and then point it just off the edge of the full Moon the EVF amplifies the image (tryig to compensate for the blackness of space) and the internal reflections of the Moon surface show up very brightly. Slide out the rear filter and the reflection disappears leaving only clean black space and a white Moon. And all my resolution tests show that there's no detectable difference with or without it. Maybe it would matter for AF or something?
So IMO if you're shooting bright or high-contrast objects you're better off without it and otherwise it just doesn't matter either way.
So IMO if you're shooting bright or high-contrast objects you're better off without it and otherwise it just doesn't matter either way.
Feb 19, 2011 at 04:58 PM
p.10 #14Moon By Lens (100% crops)
Perhaps it's a soft element behind it? Soft, as in coating or glass type or otherwise? I don't know, I don't have a block diagram that says anything.
"merely conjecture"
"merely conjecture"
Feb 19, 2011 at 05:05 PM
p.10 #15Moon By Lens (100% crops)
There's some more discussion about this with Ed Sawyer (who I do trust to know what he's talking about) starting here: https://www.fredmiranda.com/forum/topic/954103/1#9209081 although concerning a 18mm UWA lens.
Feb 19, 2011 at 05:09 PM
p.10 #16Moon By Lens (100% crops)
The Moon:
400mm, f/5.6, 1/20s, ISO 100
The Lens:
Tamron 200-400mm AF, IF, LD, f/5.6
That's through clouds in the day-time BTW... I'm waiting for a clear night to get a good shot with this tamron. I'm thinking it'll be pretty great cuz the lens is actually quite sharp for terrestrial imaging.
Jul 04, 2011 at 10:44 PM
p.10 #17Moon By Lens (100% crops)
Here's a little better shot with this lens. It was still still hazy and the sky was dawn-ish but both less so than the previous image. With crystal skys this lens should be even better than this...
The Moon:
400mm, f/5.6, 1/20s, ISO 100
The Lens (again):
Tamron 200-400mm AF, IF, LD, f/5.6
Man, atmospheric conditions sure make a massive difference... :P
The Moon:
400mm, f/5.6, 1/20s, ISO 100
The Lens (again):
Tamron 200-400mm AF, IF, LD, f/5.6
Man, atmospheric conditions sure make a massive difference... :P
Jul 05, 2011 at 05:02 PM
p.10 #18Moon By Lens (100% crops)
OK...here are my shots...
SD14 + Nikkor 800 5.6...
SD-14 + Nikkor 800 5.6 + Tamron 1.4 TC
The Set-up...
Great stuff everyone...!!!
SD14 + Nikkor 800 5.6...
SD-14 + Nikkor 800 5.6 + Tamron 1.4 TC
The Set-up...
Great stuff everyone...!!!
Jul 05, 2011 at 10:39 PM
p.10 #19Moon By Lens (100% crops)
Leica APO-Telyt 280/4 + Canon 2x II + Canon 1.4x II = 780mm/f11 (5D, 100% crop)
http://praetoriusphoto.images.s3.amazonaws.com/fmforums/20110715_moon_784.jpg
And, comparison between Canon 1.4x II and Leica APO-Extender-R 1.4x
100% crop, upper right corner, Canon 1.4x II first:
http://praetoriusphoto.images.s3.amazonaws.com/fmforums/20110715_moon_400_c.jpg
Leica APO 1.4x, upper right corner:
http://praetoriusphoto.images.s3.amazonaws.com/fmforums/20110715_moon_400_l.jpg
not perfectly APO in the far corners, but a lot sharper/more detailed than the Canon (the slight CA cleans up very easily with adjustment), and slightly more magnification
http://praetoriusphoto.images.s3.amazonaws.com/fmforums/20110715_moon_784.jpg
And, comparison between Canon 1.4x II and Leica APO-Extender-R 1.4x
100% crop, upper right corner, Canon 1.4x II first:
http://praetoriusphoto.images.s3.amazonaws.com/fmforums/20110715_moon_400_c.jpg
Leica APO 1.4x, upper right corner:
http://praetoriusphoto.images.s3.amazonaws.com/fmforums/20110715_moon_400_l.jpg
not perfectly APO in the far corners, but a lot sharper/more detailed than the Canon (the slight CA cleans up very easily with adjustment), and slightly more magnification
Jul 15, 2011 at 11:34 PM