AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |
Back to Blog
Shifty eyes pixel11/10/2023 ![]() ![]() I mean, extreme macro onto 104 megapixels in APS-C mode! Barely seems feasible. But whatever theory and numbers say - in practice, the outcome looks pretty darned impressive to me. All guesses though, I have no idea if or how the pixel shift algorithm works, maybe it can squeeze extra information from the overlaps. Although a virtual 240 megapixels are captured, spatially they would resolve less than that (but more than 61mpix). My guess is the outcome is much like what a heavy anti-aliasing filter would do. I wonder what it's *really* equivalent to though? Although 4 times as many "positions" are sampled by moving the sensor half a pixel, it's still a whole pixel that captures the light at each half-pixel location (kind of sub-sampling neighbouring pixels). I've attached a few of the tests consisting of a full APS-C frame and 100% crop for each of the 5x, 10x and 20x Mitties.įor quick routine stacks I think this is a pretty astonishing result in terms of captured resolution. At 50x things start to look a bit soft though (NA too low - and excluded that from the test anyway). Outcome? Well, I couldn't have been more wrong! Using pushed down Mitties on a 135mm tube lens and the camera in APS-C crop mode + pixel shift, the setup can squeeze 104 megapixels of detail onto APS-C with the 5x, 7.5x, 10x and 20x Mitties. While I was at it, I figured I might as well try 16-shot pixel shift too, even though I doubted it would work well. Hence plugging the A7riv in for a quick look-see. I figured A7rii already captured all the resolution my lenses and objectives could deliver so why over-sample for no benefit (as I thought the riv would)? But after using 4-shot pixel shift on the microscope and seeing an enormous IQ increase from the extra colour resolution, I figured that might have some uses in studio macro too. Before that I'd used only A7rii (42mpix) and A9 (24mpix) in this context and had no plans to use riv for studio macro. I've recently been using Sony A7riv (61 megapixel full frame) on my main macro rig. ![]()
0 Comments
Read More
Leave a Reply. |