AeroPhotographer

This article agrees with you and discusses the advantages of a square sensor. Remember that with a square sensor, you can crop to rectangular, but never have to rotate the camera. ...

I love Roger's articles, including this one. But I want to comment on new fast and heavy lenses.
1. I don't understand where one would use an aperture which has such shallow depth of field. ...

I bought my A6400 with the 18-135 kit lens. Since then I've added many more lenses, prime and zoom. But my most-used lens remains the 18-135. It has very good image quality, is light weight, and...

Definitely not for me.  I don't shoot sports or birds in flight.  I shoot birds often, but not in flight.  I don't even shoot bursts of birds.  When I tried that all the frames looked alike. Perhap ...

I mentioned in an earlier post that I loved my Sam 45. I also mentioned that a new Sigma 45 contemporary was inbound. I succumbed to stunning resolution test at opticallimits. https://www.opticalli ...

This lens is very light weight. That's a big plus for me.  But perhaps not for photofan. see https://petapixel.com/2021/01/23/in-praise-of-inexpensive-lenses/

I've had the Sam 45mm for about 6 months. I love it. It's outstanding in pop and contrast. I have a test that I run on sloped roofs to determine at what aperture does the side sharpness catch up ...

Examples are DP Review, Petapixel, and Fstoppers. OP

But the photo websites are not run by content creators.   They are run by editors. I hope those editors will read this thread and note that many of us don't watch videos.  I've even politely ...

Amen. I recently wrote this article about Full Frame vs APS-C https://petapixel.com/2020/12/31/camera-gear-overkill-why-bigger-and-faster-is-not-always-better/ It acknowledges that FF has greater ...

Spot on about arm waving.  Makes me want to handcuff the guy!

Here are some of mine. Let's hear yours. Videos. I don't watch them. They are a very slow and boring way to impart information. In lens review sample galleries, many of the photos are devoid of ...

A Quick Check of Field Flatness Playing with manual lenses has awakened me to an easy way to check field flatness. Look at newspaper(s), grass, or pavement obliquely with focus peaking set at mid ...

I forgot to mention that the cheap 35mm lens is noticeably sharper than my treasured Nikon F 35mm f2 lens (with adapter).  I've tested both on center and at the edge of the frame.

Dear Roger,

I love it that you are giving us the benefit of your technical expertise. Thank you. I need your help as explained below.

There are terms "depth of field" which refers to the scene,...

In the past month I've bought 4 Chinese manual-focus E-Mount APS-C lenses. Focal lengths are 25mm f1.8, 28mm f2.8, 35mm f1.4 and 50mm f1.2. Cost ranged from $50 to $98. I'm very impressed by their ...

I shoot birds with my Sony A6400 and 400mm or 350mm lenses at f11. ISO is usually about 200. I like f11 for the DOF.

f11 is also my most-used aperture for regular photography with 20-100mm...

I shot these a few days ago at Charleston Slough, my favorite birding site. All shot with Sony A6400 and 70-350mm lens. The shots are a departure for me. I pushed for detail on the white plumage. ...

I'd love to see test data presented like frequency response curves. Y axis = contrast, X axis = spatial frequency. Then graph for center mid frame and edge. Of course at different...

Agreed.  That bee is a European Wool Carder.  They are very "darty" and hard to photograph.  This one must have gotten tired because he lighted on the leaf for almost a minute.  They have a great ...