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Author Topic: There is No Perfect Lens - Article by Roger Cicala  (Read 2486 times)

Mt Spokane Photography

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There is No Perfect Lens - Article by Roger Cicala
« on: September 20, 2013, 11:09:10 PM »
Roger has not only the knowledge, but the very rare talent and ability to explain things in a way that we can understand.
 
There are lots of posts asking which lens is best, or asking if I have poor resolution, too much flare, or decentering, and more.  Roger addresses the variables in lens design and manufacturing in a way that most of us can understand, and having a background as a designer, lab manager, and tester of some very tightly specified components and systems, I think he has hit it right on the head.
 
Enjoy!!
 
http://www.lensrentals.com/blog/2013/09/there-is-no-perfect-lens
« Last Edit: September 21, 2013, 04:15:09 PM by Mt Spokane Photography »

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There is No Perfect Lens - Article by Roger Cicala
« on: September 20, 2013, 11:09:10 PM »

J.R.

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Re: There is No Perfect Lens - Article by Roger Cicala
« Reply #1 on: September 21, 2013, 02:39:06 AM »
Thanks for the link. This paragraph however, jumped out -

Quote
For those of you who like to avoid reality, let me be very clear. There is no such thing as zero tolerance. Not if you measure accurately enough. If you want the very best quality obtainable, then a nice f/2.8 zoom would be priced at $20,000 to $40,000. What a coincidence — that’s about the price range of cinema-quality zooms
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Re: There is No Perfect Lens - Article by Roger Cicala
« Reply #3 on: September 21, 2013, 08:09:09 AM »
Interesting article. Thanks for sharing.

chauncey

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Re: There is No Perfect Lens - Article by Roger Cicala
« Reply #4 on: September 21, 2013, 08:30:06 AM »
Great article...thanks for sharing the link.  Quality control vs cost is an often overlooked aspect of everything manufactured.

androiduk

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Re: There is No Perfect Lens - Article by Roger Cicala
« Reply #5 on: September 21, 2013, 10:35:22 AM »
Great article, thanks! It's very comforting to know that unless you have a really horrendous copy of a lens, these manufacturing defects will not really impact hard copy prints to any significant degree.

Pi

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Re: There is No Perfect Lens - Article by Roger Cicala
« Reply #6 on: September 21, 2013, 11:46:12 AM »
Thanks for the link. This paragraph however, jumped out -

Quote
For those of you who like to avoid reality, let me be very clear. There is no such thing as zero tolerance. Not if you measure accurately enough. If you want the very best quality obtainable, then a nice f/2.8 zoom would be priced at $20,000 to $40,000. What a coincidence — that’s about the price range of cinema-quality zooms

Yeah, and he has 7 references to back up those numbers.  ;)

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Re: There is No Perfect Lens - Article by Roger Cicala
« Reply #6 on: September 21, 2013, 11:46:12 AM »

ejenner

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Re: There is No Perfect Lens - Article by Roger Cicala
« Reply #7 on: September 26, 2013, 10:59:55 PM »
I liked that comment too.  How many times do you read someone saying something like 'for 1k or 2k I expect a perfect lens'.  LOL.  I could say for 10k I expect a perfect car, but reality and my expectations may not be in alignment.

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Re: There is No Perfect Lens - Article by Roger Cicala
« Reply #7 on: September 26, 2013, 10:59:55 PM »