07-19-2019, 03:20 PM
Hmmm, I don't think I could handhold a 1200 mm lens - which is by far creating the most troubles for a viewfinder - but even more so to myself. Settling the lens on a stable tripod and a solid gimbal is for this kind of FL essential. And then the refresh rate will be sufficient, except when chasing rather fast subjects moving across FoV.
Next to that: Even if an OVF has no refresh rate (but our eyes also can't process pictures with infinitely fast speeds), the AF-module of a DSLR also has a refresh rate (I don't know how fast that is, hopefully faster than only 120 Hz).
This kind of complaint is rather academical. The time I need for framing is sooo much longer than 1/120 sec, I simply don't care about EVF refresh rate. If I turn the lens in 1 sec 90° horizontally, I would theoretically get a picture each 90/120 degrees (or each 0.75°. But do I need to see smaller angles? Could my brain process these 120 frames per 90° turn? I have a lot of doubts about how signficant this "scientific findings" are.
Next to that: Even if an OVF has no refresh rate (but our eyes also can't process pictures with infinitely fast speeds), the AF-module of a DSLR also has a refresh rate (I don't know how fast that is, hopefully faster than only 120 Hz).
This kind of complaint is rather academical. The time I need for framing is sooo much longer than 1/120 sec, I simply don't care about EVF refresh rate. If I turn the lens in 1 sec 90° horizontally, I would theoretically get a picture each 90/120 degrees (or each 0.75°. But do I need to see smaller angles? Could my brain process these 120 frames per 90° turn? I have a lot of doubts about how signficant this "scientific findings" are.