Changing F-Stop for Canon EOS lenses.

K

kwang0429

Member
So say if I have a 50mm F1.4 lens, if I want to shoot that at F4, I have to put it on my 5D and hold the DOF button than detach the camera and put it back on my brevis in order to make it read as F4, do any of u guys know an easier way to make EOS lens work better with the 35mm Adaptor? thanks in advance.
 
Car3o said:
get nikon lens.
no other way.
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I don't think you quiet know what you are talking about cause Nikon Nikkor lens is the same as EOS lenses, they have no manual F-Stop adjustment on the lens which is the same as Canon EOS lenses, and Canon FD lens has the manual F-stop adjustment on the lens as well, but I am asking for EOS lens.
 
K, good timing on this question. We shot a video university segment that answers this question and a few others. Chris finished editing it today, so we'll encode and have it up by Monday. The short answer is that you can do what you're trying to do using any EOS body, (an old Rebel from ebay would do just fine) by mounting the lens, setting manual exposure to f4, engaging DOF preview and removing the lens "hot". The aperture will stay where you had it set. It takes all of about 4 seconds. I've got it directly from Canon Canada that you can do this without damaging the lens as they are designed to be hot swapped. The video explains it rather nicely but this should get you going.

Cheers,
Dennis.
 
kwang0429 said:
I don't think you quiet know what you are talking about cause Nikon Nikkor lens is the same as EOS lenses, they have no manual F-Stop adjustment on the lens which is the same as Canon EOS lenses
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Not true. The majority of Nikon lenses does have an iris ring, only the newest models lack F-stop adjustment. That's why they're the preferred lenses for most people using 35mm adapters. It's not that much of a hassel to change f-stop on EOS mount since don't usually change f-stop constantly anyway.
 
Huy Vu said:
Not true. The majority of Nikon lenses does have an iris ring, only the newest models lack F-stop adjustment. That's why they're the preferred lenses for most people using 35mm adapters. It's not that much of a hassel to change f-stop on EOS mount since don't usually change f-stop constantly anyway.
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it's the same as Canon, majority of their lenses are FD which has the F-stop adjustment, it's like comparing the older Nikon lens with Canon Fd lens and now comparing the DX lens with EOS lens, which both don't have F-stop adjustment on it anymore.......
 
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Dennis Wood said:
K, good timing on this question. We shot a video university segment that answers this question and a few others. Chris finished editing it today, so we'll encode and have it up by Monday. The short answer is that you can do what you're trying to do using any EOS body, (an old Rebel from ebay would do just fine) by mounting the lens, setting manual exposure to f4, engaging DOF preview and removing the lens "hot". The aperture will stay where you had it set. It takes all of about 4 seconds. I've got it directly from Canon Canada that you can do this without damaging the lens as they are designed to be hot swapped. The video explains it rather nicely but this should get you going.

Cheers,
Dennis.
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Thanks Dennis, will you guys be inventing something that can read EOS or newer nikon lens on the 35mm itself without having to use a camera to change the F-stop and doing the swap? I was talking to Brian Valente from redrock, seems like canon is very secret about letting their system out ...thanks.
 
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kwang0429 said:
it's the same as Canon, majority of their lenses are FD which has the F-stop adjustment, it's like comparing the older Nikon lens with Canon Fd lens and now comparing the DX lens with EOS lens, which both don't have F-stop adjustment on it anymore.......
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Except that Canon no longer makes camera for FD lenses. Their line up now is exclusively EF, unlike Nikon.
 
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