Nidelva river through Trondheim Norway

Nidelva river through Trondheim Norway
by Saaru Lindestokke                

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1

Most objectives (I have yet to see a counter-example) do not have hard fall-off at the edges because optics make it very rare case - to draw a sharp edge on the sensor an objective should have some inner part of it to be in a specific place. Every objective which you will try will draw a smooth circle on the sensor and you will only have a chance of dark ...


5

The only guarantee is that a DX lens will throw an image circle approximately large enough to cover a DX sensor. Some throw them a bit larger, but the only way you'll know if a given lens does that or not will be to try it. Carrying your math a bit further, the DX diagonal is 0.12mm smaller than that of the AX100. The pixels on that sensor have a diagonal ...


1

Using Catia (Mechanical engineering software), I tried to answer your question by retro-engineering the canon parts. I found a 3D model of a canon lens from grabcad.com and isolated the lens mount geometry. I compared its dimensions to the ones of my lenses and found them accurate enough. On the following view, you can see the lens mount. I used brass as ...


2

If the lenses are not currently made to mount on Nikon DSLR bodies (i.e., Nikon F-mount), then no, you probably cannot buy an adapter to use them on your Nikon body. The reason for this is that Nikon's F-mount has one of the largest flange focal distances (also known as registration distance) for currently-available DSLR bodies on the market. I believe your ...


1

I'm sure there are a multitude of such lists. And every one of them is probably different from every other one of them. Well, unless it has been plagiarized from one of the other list writers. There is, however, no such list universally recognized as definitive. (This statement is based upon my own personal history in photography over the last 35 years or ...


1

... as the adapter increases the distance between the sensor and the lens by ~10mm, does this effectively make my 50mm lens a ~60mm lens? Or am I just misunderstanding things? You're misunderstanding things. The Minolta MD/MC registration distance (or flange focal distance)--that is, the distance from the mount flange to the sensor, is 43.5mm. If the ...


1

The answers you've gotten are correct, a standard/correct adapter does not change the focal length. It is worth noting however that there are some adapters called Speed Boosters which are designed to do exactly that. They counteract most of the "crop factor" caused by the smaller sensor. They aren't cheap, but it's always good to know your options. For ...


6

It's not just the weight of the camera that's a concern, but the torque that it will apply to the mounting ring on the lens (and in the camera, of course). Torque is turning force, and it's calculated by multiplying force (weight, in this case) by distance from the center of rotation. So, if we guess that your camera is 4" deep from the mount to the back of ...


2

The 1D Mark II was 55.5 oz. The 5D Mark III + BG-E11 grip + 2 LP-E6N batteries is about 59 oz. The heaviest flash Canon has sold in the recent past is the 600EX-RT which is 18.5 oz with batteries installed. The WFT-E8A is another 1.35 oz. Add that up and you're at 79 oz. which is about 17 oz. less than a 6 pound CCD camera. The EF mount should be able to ...


1

I don't have the answer for you but the answer is maybe obvious : if it were a classic mechanical problem, I would say that the lens capacity shouldn't exceed the capacity of the body (using no lens collar): If you body can support a 2 kg lens on the body mount, then the same weight is supported by the lens mount ; If your lens comes with a collar for your ...



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