Full frame rangefinder solutions. Not leica

Started Aug 18, 2013 | Discussions thread
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Re: Full frame rangefinder solutions. Not leica
In reply to bosjohn, Aug 19, 2013

bosjohn wrote:

the term slr while traditionally used to describe cameras with mirrors and prisms but the acronym means single lens reflex I used the term correctly. the taking lens is used for viewing and framing the photo and the light path is bent with prisms mirrors or electronically. Its the bent light path that makes them reflexes so a view camera while using the taking lens to frame and view the shot is not an slr

So where is the "light path...bent" in a mirrorless camera?  LOL.  It's not bent at all.  The light has a direct path to the sensor.  So you're wrong there.  Secondly, the "reflex" in "single lens reflex" means that the light is bounced (reflected) off a mirror or series of mirrors.  No mirrors in a mirrorless camera either.  (Hint: that's why they call them *mirrorless* cameras.) So you're wrong there, too.

Modern autofocus is pretty darn good but a long base rangefinder would still be more accurate.

First of all, rangefinder accuracy does depend on how long the base is, but the base is limited by camera body size.  Modern AF is not limited by camera body size at all.  Furthermore, rangefinder accuracy is effected by focal length and focus distance.  AF is not.  For example, AF is capable of pinpoint accuracy even with very distance objects (like when using long focal lengths) because it's focusing on a *magnified* image.  Rangefinder focus has no capacity to use a magnified image for greater focus accuracy.  Furthermore, rangefinder focus will always only be good as the eyesight of its user.  AF does not suffer from this limitation.  Modern AF systems have higher sensitivity, precision, responsiveness, and accuracy than most humans can muster...and the gap in performance between man and machine only increases as the human ages.

Most rangefinder shooters don't shoot with very shallow DOF, simply because it's very difficult to get spot-on focus accuracy when shooting with such narrow DOF. Or if they do shoot with very shallow DOF, they certainly aren't shooting quickly, or at fast moving subjects. I certainly wouldn't want to shoot a small child at shallow DOF with a rangefinder.  Most rangefinder shooters would opt for deeper DOF, or even zone focusing, for that situation.  For focus accuracy and speed, especially at narrow DOF, modern AF is definitely the way to go.  It's a lot faster and more accurate.

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