stephenmelvin
Senior Member
This would seem to go against what I've been saying (and have read elsewhere).
Very interesting...
Very interesting...
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Canon EF 50mm f1.0 listing
- Thread starter Kahuna
- Start date
stephenmelvin
Senior Member
Your equipment list says all you use is a 14mm lens... You're pulling a fast one, aren't you? 
Jason Hutchinson
Forum Pro
I believe Greg has owned every EF lens out there except the 1200f/5.6, and several copies of a lot of them so I don't think he is pulling your leg. As I recall Dave mentioned he thought it was odd that Greg owned every 50mm lens Canon made when he first met him.
By the way, I should be down by Greg and Dave on Saturday so maybe Dave will let us do a test with his 50f/1.0. What are you doing Saturday Greg? Did Fred mention to you we were going birding?
jason
By the way, I should be down by Greg and Dave on Saturday so maybe Dave will let us do a test with his 50f/1.0. What are you doing Saturday Greg? Did Fred mention to you we were going birding?
jason
stephenmelvin
Senior Member
I opened up the 1.0 and 2.0 images in Photoshop and put one over the other. Turning the layers on and off shows a definite difference in brightness. Oddly, I didn't see this in the histogram.
I hope you don't mind, but I made an animated gif comparing 2.0 to 1.0:
Pretty much shows it all. Vignetting is worse at f/1.0, but overall brightness is lower as well.
I hope you don't mind, but I made an animated gif comparing 2.0 to 1.0:
Pretty much shows it all. Vignetting is worse at f/1.0, but overall brightness is lower as well.
stephenmelvin
Senior Member
Oh I know. Just being funny.
As I recall Dave mentioned he thought it was
OCD perhaps?
Fun! Rifle or shotgun? Yeah, I'm up late. I get funny this time of the evening.
Jason Hutchinson
Forum Pro
By the way, you see that contrast degredation reducing the whites on film too. No angle issues there either.
Jason
Jason
stephenmelvin
Senior Member
Most lenses are softer and have less contrast wide open. Lenses that push the envelope; even moreso.
F/1.0 is for those situations where you can't use anything else, and image quality is a secondary concern. I wish it did work with our digital cameras. Perhaps someday it will work again. There's no reason microlenses have to be a permanent feature of dSLR's, right?
F/1.0 is for those situations where you can't use anything else, and image quality is a secondary concern. I wish it did work with our digital cameras. Perhaps someday it will work again. There's no reason microlenses have to be a permanent feature of dSLR's, right?
ioannis
Veteran Member
I do see vignetting at the left hand corners as the aperture widens. However after so much chatter NOONE has posted a comparison with film.
The original poster suggested that this is special for digital due to the existance of microlenses.
Until you compare it with film or until you come up with a definition of exit pupil and proven values for the f/2 and f/1.2 L exit pupil in different formats like they do here
http://www.swissarmyfork.com/digital_lens_faq.htm
and here
http://www.daviddarling.info/encyclopedia/E/exit_pupil.html
As PiXSurgeon would say this is poetry, probably surrealism (ie using words and meanings in other than their logical context),
Yiannis
-LORD VADER
-yes master
-RISE
http://www.pbase.com/ystasino
The original poster suggested that this is special for digital due to the existance of microlenses.
Until you compare it with film or until you come up with a definition of exit pupil and proven values for the f/2 and f/1.2 L exit pupil in different formats like they do here
http://www.swissarmyfork.com/digital_lens_faq.htm
and here
http://www.daviddarling.info/encyclopedia/E/exit_pupil.html
As PiXSurgeon would say this is poetry, probably surrealism (ie using words and meanings in other than their logical context),
Yiannis
-LORD VADER
-yes master
-RISE
http://www.pbase.com/ystasino
stephenmelvin
Senior Member
A comparison with film would be helpful.
Did you see my handy animated gif?
It's not just vignetting. It's darker in the center as well.
Did you see my handy animated gif?
It's not just vignetting. It's darker in the center as well.
If all goes well I will probably be around Sabine woods or High Island.
Greg
--
http://www.pbase.com/dadas115/
Greg
--
http://www.pbase.com/dadas115/
While there is more vignetting wide open the exposure near the center of the frame doesn’t appear to be all that much different. The contrast wide open does suffer noticeably but the detail is still pretty good. A little contrast adjustment in PS and the pictures look nice.
Here is a wide open shot taken with the lens wide open on my 1D2 (this is the full frame)
This one was scaled down and nothing else
Here is another less interesting one:
It looks like you do get a slight exposure loss wide open but it appears to be pretty far from a full stop. The bokeh doesn’t look half bad either.
In any case I would suggest that the 50mm f/1.0 is far from useless on digital bodies.
Greg
--
http://www.pbase.com/dadas115/
Here is a wide open shot taken with the lens wide open on my 1D2 (this is the full frame)
This one was scaled down and nothing else
Here is another less interesting one:
It looks like you do get a slight exposure loss wide open but it appears to be pretty far from a full stop. The bokeh doesn’t look half bad either.
In any case I would suggest that the 50mm f/1.0 is far from useless on digital bodies.
Greg
--
http://www.pbase.com/dadas115/
To me it appears that the f/2 picture is actually “darker” in the center due to its superior contrast. The yellowish area around the dollar bill is very similar in intensity to my eyes.
Greg
--
http://www.pbase.com/dadas115/
Greg
--
http://www.pbase.com/dadas115/
Elan Remford
Senior Member
Actually, it means nothing, as the item may have been listed a dozen times without selling, for which eBay offers the option of relisting the item, as previously posted, images and all.
E.
E.
Jared-5
Senior Member
This has happened so many times on eBay with the 50mm f/1.0 that all I have to to is find my old post and cut and paste!
For your reading enjoyment see this thread (March 10, 2005):
http://forums.dpreview.com/forums/read.asp?forum=1029&message=12609889
The photos are from a previous eBay auction several months ago!
(December 10th if I'm correct)
I know this because I copied the photos to my hard drive last time I saw a 50mm 1.0 on eBay. I don't come across these lenses too often, and wanted to be able to look at it after the auction ended.
So after reading your post, I found the pictures that I had saved (because his looked a bit familiar) and compared..
What you see pictured is SOMEONE ELSE'S LENS!
I can't believe the guy has the nerve to say in his listing : "The lens element is clear as you can see in the pictures. All pictures are of the actual item."
Of course i will have to eat my words if it turns out that this is actually the same lens on eBay again. In which case the guy is justified in using the same pictures.
BUT, if so, how could he have bought it off of eBay months ago and yet be a new member with zero feedback?
These are all questions that you should ask the seller if you're remotely interested in buying from a "seller" who just joined eBay today.
--
For your reading enjoyment see this thread (March 10, 2005):
http://forums.dpreview.com/forums/read.asp?forum=1029&message=12609889
The photos are from a previous eBay auction several months ago!
(December 10th if I'm correct)
I know this because I copied the photos to my hard drive last time I saw a 50mm 1.0 on eBay. I don't come across these lenses too often, and wanted to be able to look at it after the auction ended.
So after reading your post, I found the pictures that I had saved (because his looked a bit familiar) and compared..
What you see pictured is SOMEONE ELSE'S LENS!
I can't believe the guy has the nerve to say in his listing : "The lens element is clear as you can see in the pictures. All pictures are of the actual item."
Of course i will have to eat my words if it turns out that this is actually the same lens on eBay again. In which case the guy is justified in using the same pictures.
BUT, if so, how could he have bought it off of eBay months ago and yet be a new member with zero feedback?
These are all questions that you should ask the seller if you're remotely interested in buying from a "seller" who just joined eBay today.
--
- Jared -
Jason Hutchinson
Forum Pro
HI and Anahuac is what we're takling about. Probably Anahuac earlier.
Jason
Jason
I will have to talk with Joanne but it looks like Saturday is going to be very good for migrants if the weather reports I have read are at all accurate. I have also heard that Anahuac has been very good recently with lots of rails and least bitterns. If the weather is like I hope it is I will probably end up going to Sabine woods for a while probably in the morning and head to HI in the afternoon. Send me an email and we can discuss it more.
Greg
--
http://www.pbase.com/dadas115/
Greg
--
http://www.pbase.com/dadas115/
ioannis
Veteran Member
First of all vignetting doen's necessarily happen in the corners it is just more readiliy observed there. And the reason I think your statements are way too generalising is not only because there is no comparison with film (which would be very hard to accurately do) but also because you haven't provided any documentation to your claims about exit pupils and these lenses.
At least some theory in controlled lighting would help.
I did see your animated gif but again no comparison with film. However, I have to thank you for starting this discussion, as a result I know know what microlenses and exit pupils are
Also these lenses are not so much bought for their low light availability but the background blur. I would suggest you handle one take a couple of portraits with the disclaimer that there is a danger you might be converted.
Yiannis
-LORD VADER
-yes master
-RISE
http://www.pbase.com/ystasino
At least some theory in controlled lighting would help.
I did see your animated gif but again no comparison with film. However, I have to thank you for starting this discussion, as a result I know know what microlenses and exit pupils are
Also these lenses are not so much bought for their low light availability but the background blur. I would suggest you handle one take a couple of portraits with the disclaimer that there is a danger you might be converted.
Yiannis
-LORD VADER
-yes master
-RISE
http://www.pbase.com/ystasino
Joe Jones
Senior Member
This is an interesting thread.
I'll throw this into the mix: I have found the 50 1.0 to be brighter than the 50 1.4 at comparable f/stops on a full frame camera. Here is the 50 1.4 at 1.4 (top), and the 50 1.0 at 1.4 (bottom), both at the same shutter speed on the 1Ds. I have had the same result with the 1DsII.
--
Joe Jones
Redland, Florida
For nature and astro photography see http://www.pbase.com/jayseejay
I'll throw this into the mix: I have found the 50 1.0 to be brighter than the 50 1.4 at comparable f/stops on a full frame camera. Here is the 50 1.4 at 1.4 (top), and the 50 1.0 at 1.4 (bottom), both at the same shutter speed on the 1Ds. I have had the same result with the 1DsII.
--
Joe Jones
Redland, Florida
For nature and astro photography see http://www.pbase.com/jayseejay
I think Steve might have stated a disclaimer up-front. Something to let people know that he's not an optical engineer, doesn't have inside technical details, has never used the lens(es) in question, has no tests that show the effects (of lost bokeh and light) taken under reasonable scientifically controlled conditions and is only addressing one single aspect of the lens...it's light loss at full aperture.
In fact, he did just this on this thread...
http://forums.dpreview.com/forums/read.asp?forum=1029&message=12612716
quote
And when empirical results from actual owners of these lenses contradict the claims of what amounts to hearsay...well...it ends up being a moot argument. And I'm not saying Steve's wrong, just that his position to argue/prove the claim is somewhat weak.
-- Greg
In fact, he did just this on this thread...
http://forums.dpreview.com/forums/read.asp?forum=1029&message=12612716
quote
quote
And when empirical results from actual owners of these lenses contradict the claims of what amounts to hearsay...well...it ends up being a moot argument. And I'm not saying Steve's wrong, just that his position to argue/prove the claim is somewhat weak.
-- Greg
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