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06/07/2004 10:08:26 PM · #1 |
So, what really happens when you purchase a lens, such as this one, where the minimum Aperture is greater than 5.6?
- Does the lens send false information to the camera saying that it is really 5.6 so that the camera will continue to focus correctly?
- Does the camera still focus correctly?
- Does the camera meter properly or is it always a 1 stop off when zoomed out completely? Or, does the lens only lie to the camera when focusing and then the metering is done correctly?
Any information will be greatly appreciated. If there are already articles written about this somewhere that someone knows of please point me in that direction.
Thanks for the help!!!
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06/07/2004 10:24:01 PM · #2 |
| You get 4.1 lbs piece of crap,but I have seen some nice photos taken with that.... |
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06/07/2004 10:24:29 PM · #3 |
Originally posted by wackybill:
- Does the lens send false information to the camera saying that it is really 5.6 so that the camera will continue to focus correctly? |
Some lenses do this, yes.
Originally posted by wackybill:
- Does the camera still focus correctly? |
In bright light, sometimes it works OK, but it will "hunt" more than say, a bright Æ’/2.8 lens. (Remember that the camera always has the lens wide-open when you are looking through the viewfinder / focusing, so the "faster" a lens is, the brighter the viewfinder and the better the focusing).
Originally posted by wackybill:
- Does the camera meter properly or is it always a 1 stop off when zoomed out completely? Or, does the lens only lie to the camera when focusing and then the metering is done correctly? |
The metering is "off" and will require some exposure compensation because of the mis-information. Even the "wrong" aperture information is recorded in the EXIF data.
But as Pitsaman says the "Bigma" (as this lens is often referred to) can take some nice pictures...
Message edited by author 2004-06-07 22:35:37. |
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06/07/2004 10:32:01 PM · #4 |
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06/08/2004 01:00:06 AM · #5 |
this picture here that pitsaman linked is a good example of the wrong f-stop being recorded to the exif data.
wrong exif info |
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06/08/2004 06:56:21 AM · #6 |
Thanks for the information, guys! This is what I was looking for. I'm not specifically interested in the lens it self but was interested in how the camera and lens actually worked together in this situation. A friend of mine who purchased a Digital Rebel this weekend was actually looking at this lens but I talked him out of it and he went with this lens instead. I'm hoping I recommended the right thing? I just liked that the 80-400mm had IS and that the max aperture was not above 5.6 at any focal length.
Any information or photo examples you have that were taken with the Simga 80-400mm 4.5-5.6 EX IS would be greatly appreciated.
Thanks again, guys!
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