Recent content by wiltw

Not 'forgotten' ...entirely different issue than optical mag vs. digital pixel reduction to same effective magnification, and zooming in to chimp the result. But I see all these 'here are some photos taken with wonderful (new camera X), and the forum only suppots 1600 x 1600 pixel files in the...

The debate about optical magnification with some IQ loss vs. digital crop could be one of the endless "It depends!" debates With digital cropping to achieve 1.4x magnification equavalent, you are throwing away 29.6% of the frame (1/1.4 = .714) If you use a good teleconvertor, we know (from...

A teleconverter essentially magnifies...everything, including the optical shortcomings inherent to the lens design! Some lenses show off their shortcomings more with a teleconvertor attached than others...the earlier Canon 100-400 was an example of that. The later version is better in that...

A thyristor had no exposure automation capability...it merely re-routed unused electric charge so that the storage capacitor was not fully drained with every firing. It was a photosensor that told the flash 'enough light' that caused the thyristor to route the surplus electric charge back to...

Different brands of rechargeable lithium ion batteries will ALL have the same battery lifetimes! It is a known fact that lithium ion batteries ALL begin to lose capacity from the day they are made...CHEMISTRY at work, nothing more, nothing less. So if you replace a Dyson with another brand, and...

I have Kodacolor negs from back in 1962 (I was 12!) and I can assure you that there was no defect evident in scanning. and from about 1964

From my experience in wedding coverage, it seems that the 'difficult' celebrants seem to more often be Protestant clergy, while the more flexible celebrants have tended to be Roman Catholic...I have no idea why that seems to be the pattern. "No photography during the ceremony" is the...

APS-C Pro Perfectly fine to shoot with (you should understand that I had abandoned 135 format film for Medium Format, except when I needed fast aperture lenses) Gives greater Depth of Field than FF when using same aperture and lens that gives same Angle of View as FF...sometimes you WANT...

Let us assume you have a less-than-'Excellent' performing lens (most are not!)...it starts off delivering about 64 line-pairs per millimeter of resolution on the film. The eye needs no fewer than 5 line-pairs/millimeter on print for it to be satisfied enough to have you think 'sharp print'...no...

So now you have proof that what others have said is true!

Focus with a camera and see what it says...to the wall with the mirror, and focusing on the image of yourself.

Then we need to consider what the optics can deliver to the sensor! 36mm horizontal, at 84 l-p/mm means 3024 line-pairs, which needs 6049 pixels horizontally, which is LESS than the 9750 pxeils if the sensor could equal the resolution of the human eye. IOW the 63 Megapixel sensor is not needed...

Commonly said that human eyes resolve one-half minute of arc. So I did the computation assuming a 50mm lens were mounted on FF digital...horizontal AOV is 40 degrees. Then I did the computation of one degree, then one minute, and then half minute of arc vs. a pair of pixels within that half...

No, I already speculated the camera selected the shutter speed in support of the equivalent FL on the smaller format. Separately I commented that many camera with auto ISO had some pretty goofy combinations of auto ISO and shutter speed, which was the reason I had chosen to not use auto ISO...

Camera selection of ISO is not always the 'best' for a situation...more recent cameras might have better selection. It is one reason I choose not to use auto ISO. Given your selection of aperture, and its detection of the FL setting, it might have decided that it needed to se 1/320 as a...