![]() The other two methods increase your effective aperture as well, but without the added distortion the glass will give you.Ĭlick to expand.It sounds like you're thinking that the 50 lets you get twice as close, letting you get a bigger image, but that's not the way it works out. Another possibility would be teleconverters, but the optical quality will drop quite a bit using those, as they effectively increase aperture size while adding more glass in the optical pathway. If you want higher magnification, then you need to get a bellows system or extension tubes. So a Morgan Dollar will more than likely overlap the entire sensor where as a Roosevelt Dime will fit entirely within the image sensor. As macro lenses, they are designed to shoot with a magnification of around 1:1, meaning that the image of the coin will be 100% of it's actual size being projected onto the imaging sensor of the camera. If I had to choose between the two, I'd go for the 90mm as you have a longer working distance from the coins surface.Īs far as being able to take highly magnified images of your coins, neither will perform the task. But I know in coin photography that working distance is a part of the equation when trying to properly light the coin. I will be happy to know if I am wrong.I'm not familiar with those two specific lens's. Extension tubes and maintain sharpness properly at center. After all, the physical construction, the curvature of the lens elements are made to provide corner to corner sharpness for a prime lens. But if you are trying to add versatility to your telephoto just by reducing the focusing distance by a small tube like 7mm or 10mm, you will see a drop of optical quality in addition to drop in the exposure. At 1:1, no one cares for the drop in sharpness at edges, so it is OK. ![]() So the assumption that that image quality will be lossless at the minimum focusing distance after putting on the tubes is not 100% correct. Again use the extension tube and check for the sharpness at the edges. For example, take a photo at the minimum focusing distance of a lens and check for the sharpness at the edges. Without floating elements in the lens, it is simply not possible to maintain the same field curvature for a lens below it’s closest minimum focusing distance. ![]() I think we should be considering field curvature while considering macro extension tubes. Vello EXT-SFED Deluxe Auto Focus Extension Tube Set for Sony E-Mount (Order Here) Sony A7II + FE 55mm minimum focus distance with 10mm + 16mm Vello EXT-SFED AF Extension Tubes Extension tubes have no optical elements so they do not degrade the quality of your lenses. Sony A7II + FE 55mm minimum focus distance with 16mm Vello EXT-SFED AF Extension Tubeįor closer focusing use the larger extension tube or stack the tubes together. Sony A7II + FE 55mm minimum focus distance with 10mm Vello EXT-SFED AF Extension Tube Sony A7II + FE 55mm minimum focus distance without Extension Tubes They give your E-mount lens macro capability while maintaining the lens’ original optical quality. Their metal E-mount lens mount is smooth and solid for a secure fit built for durability. These are fully automatic extension tubes in that they are able to communicate all electronic functions from lens to camera including autofocus and auto exposure. Vello EXT-SFED Deluxe Auto Focus 10mm and 16mm Extension Tube Set for Sony E-Mount (Order Here) Vello EXT-SFED Deluxe Auto Focus Extension Tube Set The set includes two extension tubes, one 10mm and one 16mm, that can be used individually or together to create the desired magnification. Vello EXT-SFED Deluxe Auto Focus Extension Tube Set for Sony E-Mount ($82.50 at B&H Photo) offer Auto Focus and Auto Exposure without any vignetting or cropping on fullframe Sony a7 a7R a7S and a7II mirrorless cameras. ![]() Here’s the answer for those of you asking for a set AF/AE extension tubes for full frame Sony a7-series cameras.
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