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Focus by Wire

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addy landzaat View Drop Down
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Post Options Post Options   Quote addy landzaat Quote  Post ReplyReply Direct Link To This Post Posted: 27 June 2019 at 17:04
Originally posted by QuietOC QuietOC wrote:

Pentax has a 40mm F2.8 XS that only sticks out 9mm from their mount. It was designed for their mirrorless camera that used their SLR mount. It sounds like it has a mechanical focus ring and a mechanical aperture.
It is basically the same lens they have for decades, first as a manual lens, later as the DA 40mm Limited with AF. However, there is no AF adapter for Pentax lenses.

The much larger Canon pancake is everything-by-wire.
Yes, I did not realize that, but you are right
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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: 28 June 2019 at 07:58
Originally posted by addy landzaat addy landzaat wrote:

Originally posted by QuietOC QuietOC wrote:

Pentax has a 40mm F2.8 XS that only sticks out 9mm from their mount. It was designed for their mirrorless camera that used their SLR mount. It sounds like it has a mechanical focus ring and a mechanical aperture.
It is basically the same lens they have for decades, first as a manual lens, later as the DA 40mm Limited with AF. However, there is no AF adapter for Pentax lenses.


Thanks - yes, I found myself looking at that yesterday. Can't find a decent review of it, and maybe too expensive to pick up on a try-and-see basis, but the MF version on a dumb adapter looks useful.
The Neewer 32mm f1.6 looks useful for a certain type of thin-DOF close-up, though at full aperture the Nex runs out of shutter speed at 1/4000 in bright sunlight. Not really a general purpose lens, though maybe worth carrying around for those.
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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Entropy512 View Drop Down
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Post Options Post Options   Quote Entropy512 Quote  Post ReplyReply Direct Link To This Post Posted: 09 July 2019 at 15:14
Originally posted by addy landzaat addy landzaat wrote:

Originally posted by Kilkry Kilkry wrote:

There are not more important gaps in my opinion (parrot to you perhaps). Though this wasn't the point of the thread though.
Nope, it was not.

If adapted lenses are an option: Canon 40mm pancake lens - if you own an adapter already, else it becomes somewhat expensive.

The 40STM is absolutely focus-by-wire, and to my knowledge, all of the Canon STMs have the much maligned "nonlinear" focus by wire. I'm absolutely positive the 50STM and 24STM are nonlinear (I own both), I'd be shocked if the 40STM isn't.

(Focus by wire is not necessarily bad - the problem is that many lens manufacturers implement nonlinear response in a similar manner to mouse acceleration on PCs, which is HORRIBLE for anything that requires muscle memory. Same reason FPS gamers disable mouse acceleration as the first thing they do.)

It's my understanding that many newer Sony lenses have linear MF, but I haven't seen a database indicating which lenses are linear and which aren't.
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Post Options Post Options   Quote Entropy512 Quote  Post ReplyReply Direct Link To This Post Posted: 09 July 2019 at 15:16
Originally posted by Miranda F Miranda F wrote:

Originally posted by addy landzaat addy landzaat wrote:

Originally posted by QuietOC QuietOC wrote:

Pentax has a 40mm F2.8 XS that only sticks out 9mm from their mount. It was designed for their mirrorless camera that used their SLR mount. It sounds like it has a mechanical focus ring and a mechanical aperture.
It is basically the same lens they have for decades, first as a manual lens, later as the DA 40mm Limited with AF. However, there is no AF adapter for Pentax lenses.


Thanks - yes, I found myself looking at that yesterday. Can't find a decent review of it, and maybe too expensive to pick up on a try-and-see basis, but the MF version on a dumb adapter looks useful.
The Neewer 32mm f1.6 looks useful for a certain type of thin-DOF close-up, though at full aperture the Nex runs out of shutter speed at 1/4000 in bright sunlight. Not really a general purpose lens, though maybe worth carrying around for those.

I think that's partly because the cost-reduced version that was the "kit lens" for the K-01 was (to my knowledge) never sold separately.

I should try and play with it on my K-to-E adapter...
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2manycamera View Drop Down
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Post Options Post Options   Quote 2manycamera Quote  Post ReplyReply Direct Link To This Post Posted: 09 July 2019 at 16:20
OK, it ain't cheap and no AF, but how about the Rokkor-M 40/2? It lives on my NEX-6 mostly using a novoflex adapter
(Also have a cheapish Vello adapter with close focus helicoid to get it to focus as close as 10" to the sensor plane). Also great on the A7 when I want full frame. It only sticks out from the body by 1 3/4" at infinity, making it pretty pocketable. Intended to be used on the Leica/Minolta CL and Minolta CLE, they are sharp, beautifully made and a joy to use. But they are expensive...
7D a77 a850 a6300 a7 24/2.8 28/2 35/2 50/1.4 100/2 200/2.8 24-70CZ 80-200/2.8 24-105 28-135 300/4 16-50DT 70-300G Tam 90/2.8 Tokina 11-16 E16/2.8 E50/1.8 E18-55 E55-210 FE 28-70 Sig E30/1.4 FE15/4.5V
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QuietOC View Drop Down
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Post Options Post Options   Quote QuietOC Quote  Post ReplyReply Direct Link To This Post Posted: 09 July 2019 at 16:39
I am impressed with the Konica AR 40mm F1.8 (and their 50 F1.8 too.)

I have the 40mm F1.7 Rokkor-QF from a Hi-Matic E. The Rokkor-M seems to use a similar formula, but with an M-mount tax.
Sony A68 A77II A6000 A7II LA-EA3 LA-EA4 MC-11
Minolta Maxxum 600si
Pentax Q7 5-15 15-45/2.8
 



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addy landzaat View Drop Down
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Post Options Post Options   Quote addy landzaat Quote  Post ReplyReply Direct Link To This Post Posted: 09 July 2019 at 21:39
Originally posted by Entropy512 Entropy512 wrote:

Originally posted by QuietOC QuietOC wrote:

Thanks - yes, I found myself looking at that yesterday. Can't find a decent review of it, and maybe too expensive to pick up on a try-and-see basis, but the MF version on a dumb adapter looks useful.
The Neewer 32mm f1.6 looks useful for a certain type of thin-DOF close-up, though at full aperture the Nex runs out of shutter speed at 1/4000 in bright sunlight. Not really a general purpose lens, though maybe worth carrying around for those.

I think that's partly because the cost-reduced version that was the "kit lens" for the K-01 was (to my knowledge) never sold separately.

I should try and play with it on my K-to-E adapter...
According to Pentax Forums it was sold separately for $249,-. The nice people over at Pentax Forums also did an in depth review of the lens.
Why not follow me on Instagram? @Addy_101
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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: 10 July 2019 at 15:24
Well, no AF, but the Meike 35mm f1.7 I bought s/h recently is very impressive and I already like it a lot. In fact it takes away most of the need for a compact AF lens, though perhaps not the desire!
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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