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Lack of sharpness at f1.8 on Canon 50mm STM

Started 4 months ago | Discussions thread
davel33 Senior Member • Posts: 2,978
Re: Similar to your story, my Canon 50mm f/1.4 super sharp but not at f/1.4

John Sheehy wrote:

Tannin wrote:

Note that some lenses are so beautifully made that you can ignore the normal rules. I habitually shoot a Canon 600/4 wide open at f/4 for example, I expect perfect sharpness at f/4, and get it. But it weighs 4 kilograms and cost $15,000.

This is why generalizations are wrong. I read all the time "lenses are sharpest at f/8" or "lenses are sharpest 2 or 3 stops down from open", and I think of my 400/4DO II, which is sharpest wide open, at f/4.

I would be VERY VERY upset if a $8000 lens was not sharp wide open.  You think that's a good example ?

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"Just one more Lens, I promise....."
Dave

 davel33's gear list:davel33's gear list
Canon EOS R Canon EOS R6 Canon RF 35mm F1.8 IS STM Macro Canon RF 24-240mm F4-6.3 Canon RF 85mm F2 Macro IS STM +29 more
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