New Lens, Old Camera Question

So why the hurry these days?

In a past life, sometimes people wanted photos ASAP and they wanted slides. A 24 hour turn around from a local E6 processor was faster than post processing digital files.Theoretically, slides, the keepers anyway, were ready to go as is, no post processing required.

A 24 hour turn around from a local E6 processor was faster than post processing digital files.

Any subject with a dynamic range that fits in the 7 stops of a slide film would take about 5 minutes tops to process from RAW - adjust the white balance, maybe adjust any skew, crop and get the blues out of the shadows - done!

Anything that exceeds those 7 stops and you're in negative-film territory and a world of pain to get a decent positive print/scan. And taking a load more time than adjusting a RAW file's tone curve and white-balance.

I'm really not seeing a heap of time saving anywhere. Just a 'that'll do' attitude by accepting an always compromised JPEG.

would take about 5 minutes tops to process from RAW - adjust the white balance, maybe adjust any skew, crop and get the blues out of the shadows - done!

Appears to me that there would then be 4:30 minutes to spare:D

Just a 'that'll do' attitude by accepting an always compromised JPEG.

+1

Having shot mostly slides, I think "that'll have to do" fitted their use well.

Isn't using Full Frame a compromise when Medium Format is available?

Yes. Sometimes. And no. Sometimes not.

Reverting to the title topic. it is my experience that few legacy lenses have much to add to a 40+ MP sensor, and few legacy 12-20 MP cameras have much to gain from a premium modern lens, if they can be adapted at all.

Premium modern SLR lenses, including Zeiss Milvus and Otus lenses, have somewhat lower CA than their legacy versions, and are almost as sharp wide open as at f/5.6. Thet are more resistant to sun spots, and have less ghosting on digital cameras due to reiterative internal reflections. Sigma ART lenses get similar reviews, at the cost of greater size and weight.

In the reverse direction, the Nikon 55/2.8 Macro and Leica Summicron 90/2 are the only legacy lenses I find useful on a Sony A7 camera, from the A7m2 to the most recent A7Rm4. While the Summicron 90 performs with the best, it is far less convenient than the growing list of 90'ish native lenses I've accumulated.

Which oil should I use in my new car?

"Oils ain't oils" ain't just an advertising catchphrase. That stuff definitely matters. Use the wrong oil or the wrong grade of fuel and you are in for a lot of problems.

Isn't using Full Frame a compromise when Medium Format is available?

Isn't changing the subject with a non-sequiter argument a compromise too?

Pixels is pixels. They have no size until viewed or printed.