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Re: Because manual lenses.....
In reply to Anders W,
5 months ago
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Anders W wrote:
tedolf wrote:
ultimoamore wrote:
Hi,
maybe a stupid question, but my knowledge of this area is poor so...
Why some lenses are still produced with manual focus?
Example: samyang, Voigtlander...
Is it that hard to build an autofocus lens compared to a manual one???
have DOF scales so you can actualy set the hyper-focal distance and do zone focusing. Either of which is faster and more accurate than the best PDAF systems ever made.
Hyperfocal distance? I don't use that for reasons spelled out here:
http://www.trenholm.org/hmmerk/DOFR.html
Zone focus? This technique was used in the past because MF was not fast enough for certain applications. AF usually provides a superior solution here (sufficiently fast and more accurate), and if it doesn't, you can of course prefocus AF and MF lenses alike.
Precise determination of DoF for critical applications (e.g., close-ups)? Better to use the EVF/LCD in magnfied view than DoF scales and measuring tape.
Oly makes two AF lenses with DOF scales but they are about ten times more expensive than a typical legacy manual lens.
TEedolph
you don't need meausuring tape for zone focus or the hyperfocal distance. An f/2.0 lens wide open tells you exactly how far away the subject is when you look at the focus scale.
AF is not more accurate than the scale on your 40mm f/2.0 manual lens.
AF is for sissys.
TEdolph
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