If I prefer to manually focus, should I still get the FE 55?

Started Nov 11, 2013 | Discussions thread
blue_skies
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Re: If I prefer to manually focus, should I still get the FE 55?
In reply to Jefenator, Nov 11, 2013

Jefenator wrote:

turnstyle wrote:

But I kind of wonder -- isn't E/FE mount kind of disadvantageous in that case? That you can *only* mount it to an E/FE body -- as opposed to a lens that requires an adapter, and so can be used on several competing systems.

I know where you're coming from - I also fear commitment.

As much as I love working and playing with adapted lenses (and having the ability to easily ditch Sony 2 years from now and jump ship to some other maker), there is something to be said for the simplicity of working with just one system. IME adapters can add a certain "farting around" aspect that can be unwelcome (like when the sun is setting and you have to swap out a lens AND an adapter). As an enthusiast I can abide a certain degree of this but I can certainly understand full-timers wanting to maximize the work flow with just one fully integrated system.

EXIF is also nice to have.

Also, if you're going to spend the big bucks and get really particular about performance, there is this to consider:

http://www.lensrentals.com/blog/2013/09/there-is-no-free-lunch-episode-763-lens-adapters

In a nutshell, even expensive adapters degrade performance too much for the purposes of MTF testing.

Read the comments though, Tim Parkins and tjshot say it the best: I paraphrase: "Even thought the effect is measurable, it may still be a small factor consider other alignment issues (such as flange to sensor) - sample variation is to be expected, even without an adapter."

Adapters all focus past infinity -this to overcome min/max tolerance specs- but they should maintain planarity. A well-made (or costly) adapter may perform better here than a cheap ripoff. However, adapters are, if anything, very easy to build right.

In the real world IME some lenses work just fine, even on a $20 adapter. But for the ones that don't, one has to wonder: how much of a role is the adapter playing? (This would now be the prime suspect for the fuzzy right edge I got with my Tokina RMC 17mm & FOTGA adapter.)

Shimmying an adapter can always be considered, not for infinity focus, but for planarity as well. A cheap $20 adapter with screw mounts is fairly simple to adjust.

Your Tokina RMC is a very wide angle (short FL) lens, and a minor misalignment shifts the focal plane more than on a longer length lens. For such lenses, it is best to mate the lens to an adapter, after calibrating.

As always, there are no easy, absolute answers. But it might not a coincidence that I now use e-mount exclusively for wide angle.

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Cheers,
Henry

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