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E-Mount (NEX) adapters

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Micholand View Drop Down
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Post Options Post Options   Quote Micholand Quote  Post ReplyReply Direct Link To This Post Posted: 05 May 2018 at 18:44
Agree with you Bob that the overall quality of the K&F concept adapters is quite ok out of the box for the given price.
Though if you're pedantic than also these K&F concept adapters need some tweaking + modifications

The exact flange focal distance, like with many other generic third party adapters, is not given 100%. The tubes are slightly shorter too and hence infinity focus is not perfectly matching with the marking of the adapted lens. It's not that much on these K&F concept adapters, like I've seen with other cheap adapters where often infinity focus is reached with the lens set to 3-5m already. But to have the perfect flange focal distance, some levelling shim need to placed under the mount faced plate and "infinity being infinity" finally again.

Then also the black-anodized inner tube of these adapters is rather reflective and a modification to coat the inner side with a light absorbing self-adhesive foil to improve possible light reflections is advisable.

After all these modifications I'm happily using my "basic" K&F concept adapters for OM-NEX as well as the LM-NEX and haven't really seen the need for "premium" adapters, e.g. from Novoflex.

BTW, both "basic" K&F concept adapters for "OM-NEX" as well as the "LM-NEX" have four screws on the front mount.
/Michael

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Miranda F View Drop Down
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Post Options Post Options   Quote Miranda F Quote  Post ReplyReply Direct Link To This Post Posted: 23 December 2019 at 08:54
E-mount adapters:

LA-EA1
My experience with the LA-EA1 on the Nex6 is that AF is totally unuseable on all SAM lenses period. But I'm quite happy with MF much of the time anyway, so I use the LA-EA1 with any of the dinky Sony easy-chocie primes (35/50/85mm) and they're just fine.

LA-EA2
The LA-EA2 gives good AF on the Nex 6 with any of the Minolta/Sony lenses I've tried but I've mostly acquired native E-mount alternatives now so it doesn't get a lot of use - maybe because it's bigger and sticks out too much for my small gadget bag, or maybe because I'm trending back to MF to improve my fun/nostalgia quotient.

Pixco speed booster A to E-mount.
Rather disappointed in this. It fails to give the whole view of an FF lens on the Nex (though I guess it's not far off), and judging by the shutter-speed change, gives only 10% to 20% more exposure so barely perceptible as a speed booster. It's pretty heavy and doesn't give you any data or AF capability, so not recommended unless the near-FF angle of view from your A-mount lenses is enough by itself. Oh, and once fitted my copy is very reluctant to be rmeoved without extreme measures.

Dumb adapters.
Have a lot of these, mostly very cheap. the lightweight cast aluminium ones from China are pretty good.

Pentax adapters:
There was a range of very lightweight plastic MF primes made in late film days for the Pentax K mount (28mm f2.8, 50mm f2) which work very well on a dumb Px-E adapter. Despite being plastic and cheap, they are pretty good optically, especially on APS-C.

Adapters for mirror lenses:
Worth a mention that although most mirror lenses were made for DSLRs and need a long adapter for E-mount, the ones that focus close (like the Kenko 400mm) can work with a short adapter: If you get a flat M42-E-mount adapter (intended for telescopes, etc) it's about an inch shorter than the usual one and though you lose close focus, you can still get a decent MF range out of it.
Miranda F & Sensorex, Sony A58, Nex-6, Dynax 4, 5, 60, 500si/600si/700si/800si, various Sony & Minolta lenses, several Tamrons, lots of MF primes and *far* too many old film cameras . . .
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pegelli View Drop Down
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Post Options Post Options   Quote pegelli Quote  Post ReplyReply Direct Link To This Post Posted: 02 August 2020 at 16:41
I bought this Pixco branded M42 to E-mount Helicoid adapter. It's adjustable from 27 to 59 mm.

Contrary to what it says in the ad it allows infinity focus with all my M42 lenses

Also I have not observed any vignetting on Full Frame (A7Rii) using a 50 and a 200 mm lens. More testing to follow but so far it seems an excellent adaptor with better performance than advertised.
Mind the bandwidth of others, don't link pictures larger then 1024 wide or 960 pix high, see here
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woodrim View Drop Down
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Post Options Post Options   Quote woodrim Quote  Post ReplyReply Direct Link To This Post Posted: 03 August 2020 at 16:13
Originally posted by pegelli pegelli wrote:

I bought this Pixco branded M42 to E-mount Helicoid adapter. It's adjustable from 27 to 59 mm.

Contrary to what it says in the ad it allows infinity focus with all my M42 lenses

Also I have not observed any vignetting on Full Frame (A7Rii) using a 50 and a 200 mm lens. More testing to follow but so far it seems an excellent adaptor with better performance than advertised.


I have several M42 to E helicoids and have been using them for years with no issues. No problem with infinity. I have also various other helicoids of shorter length which I have dedicated to lenses from rangefinders and even an oscillograph lens.
Regards,

woodrim
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