Fresh Dew on a Rose

by adarsha joisa

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33,657 reputation
13396
bio website throughaglassdarkly.zenfolio.…
location Decatur, AL
age
visits member for 2 years
seen 23 hours ago

23h
comment Will a 50mm EF lens give the same result as a 50mm EF-S lens?
Robert - My EF 24-70mm f/2.8 L has a rear element that is even with the mounting flange. The middle of the element (which is curved) may just extend ever so slightly past the flange in the direction of the camera. At 17mm my EF 17-40mm f/4 L has a rear element that is about 1/4" forward of the mounting flange. My EF 24-105mm f/4 L is slightly further forward, maybe 5/16" at the middle of the element. My EF 70-200mm f/2.8 L IS II is recessed almost an inch into the barrel because it is a telephoto lens.
23h
comment Will a 50mm EF lens give the same result as a 50mm EF-S lens?
Further, the only reason you can't mount EF-S lenses on an EF camera is because of the extra tab on the flange. Remove the metal tab and any EF-S lens will mount on any Canon EOS body. But at certain zoom and focus positions (primarily very short focal lengths) some of the elements will extend back past the flange and into the light box. If you attempt to take a photo with a FF camera while the lens is in such a position there is the strong possibility you will have a collision between the mirror as it swings up and the back element of the lens.
23h
comment Will a 50mm EF lens give the same result as a 50mm EF-S lens?
Robert, the only Canon lenses that use fluorite elements are super telephoto lenses of 300mm or more, two versions of the EF 70-200mm f/4, and the EF 100-400mm f/4.5-5.6. NO 50mm lens Canon has ever made has contained elements that use Calcium Fluorite.
1d
comment Can I live view my Nikon D3200 via laptop/ tablet etc?
Slightly different model (D3100, the predecessor to the D3200), but the exact same issue and answer. photo.stackexchange.com/q/36130/15871
2d
comment Nikon d5100 producing extremely underexposed images
Is the mechanical link on the camera just inside the flange that controls aperture bent? This can cause weird exposure inconsistencies. As you look into the camera's light box with no lens mounted it will be on the left. Here is a link to another answer to another question with an image of the lever. photo.stackexchange.com/a/58070/15871
2d
comment Will a 50mm EF lens give the same result as a 50mm EF-S lens?
This statement is incorrect: And I am just talking about APC that is what I use but when doing macro work I use tubes to move the lens away from the sensor and magnify. I thing this is what AF versus AF-s does and due to this the 50mm is equivalent not exact measurement but measurement from the front lens element to the sensor. The effective rear nodal point of an EF 50mm lens sits the same distance away from the sensor as the effective rear nodal point of an EF-S 50mm lens. For the same f-number, the entrance pupil is also the same size.
2d
comment Will a 50mm EF lens give the same result as a 50mm EF-S lens?
I don't think the question is about optical quality. It is about field of view. Even the three EF 50mm lenses (f/1.2L, f/1.4, f/1.8) in Canon's current lineup have differing optical qualities, and they are all full frame EF lenses.
2d
comment Will a 50mm EF lens give the same result as a 50mm EF-S lens?
Please Clarify what is meant by same result. Do you mean same Field of View? Or are you referring to other optical qualities? Even the three 50mm EF lenses in Canon's current lineup have different optical qualities and all three are "full frame" EF lenses.
2d
comment Will a 50mm EF lens give the same result as a 50mm EF-S lens?
But when set at 50mm I know of no Canon EF-S lens with elements that protrude back past the flange. Do you? This is only the case with some EF-S lenses when zoomed to much shorter focal lengths.
2d
comment Will a 50mm EF lens give the same result as a 50mm EF-S lens?
...longer distance caused by a change in the direction of the center optical axis of the lens.
2d
comment Will a 50mm EF lens give the same result as a 50mm EF-S lens?
I assume that the labelling on the EF-S lens is showing "FF equivalent focal length", because they are not supposed to be attached to a FF camera. But I don't know. Your assumption is incorrect. If that were the case, then the second photo should be only the center 42% (area) of the first photo. I suspect camera position is the culprit. The center of the second image is aimed at a point quite a bit lower than the first. Changing angles will affect several factors, including distortion at the edges as well as focus breathing caused by pointing at the same objects that are now at a...
2d
comment Will a 50mm EF lens give the same result as a 50mm EF-S lens?
There is nowhere near a 1.6x difference in subject size between these two photos. There is no 50mm mark on any Canon EF-S 18-55mm lens I have seen. If you are using any other EF-S lens, then the discrepancy is likely caused by an inaccurate mark on the zoom barrel. What focal length does the EXIF info give for the photo taken with the EF-S lens?
2d
comment Will a 50mm EF lens give the same result as a 50mm EF-S lens?
Your entire question is based upon a false assumption: that the registration distance for Canon's FF cameras is longer than the registration distance for Canon's APS-C cameras. It is not. In both cases the registration distance is 44mm. The APS-C cameras allow lens elements to protrude back past the flange for certain wide angle lenses, but at 50mm this is not the case for any EF-S zoom lens of which I am aware.
2d
comment Will a 50mm EF lens give the same result as a 50mm EF-S lens?
Your entire answer is based upon the same false assumption that the question is based on: that the registration distance for Canon's FF cameras is longer than the registration distance for Canon's APS-C cameras. It is not. In both cases the registration distance is 44mm. The APS-C cameras allow lens elements to protrude back past the flange for certain wide angle lenses, but at 50mm this is not the case for any EF-S zoom lens of which I am aware.
2d
answered my wedding photos were a gift but now she wants to put them all over the internet
2d
comment my wedding photos were a gift but now she wants to put them all over the internet
Even though the photographer owns the copyright, if she is using the images commercially (i.e. to promote a business) then she needs permission of the identifiable individuals in each photo that she uses commercially.
Jan
29
awarded  Yearling
Jan
29
comment Photoshop multiple color filters
Or even with various colors of Vaseline on different parts of the front of the lens (or on a filter).
Jan
29
comment How can I find the sensor position on my camera?
@poor When a question is closed it still will show up in search results, and the finder will be directed to the original question.
Jan
28
comment How can I find the sensor position on my camera?
photo.stackexchange.com/a/46336/15871