G1 + 4/3rds adapter + Hexanon 40mm f1.8

Started Jan 13, 2009 | Discussions
Brian Mosley Forum Pro • Posts: 20,710
G1 + 4/3rds adapter + Hexanon 40mm f1.8

Inspired by Karl's beautiful post of his G1 + Nokton 40mm f1.4 here :
http://forums.dpreview.com/forums/read.asp?forum=1033&message=30651429

I had a quick play with my Hexanon alternative this afternoon... you would be shocked how cheap these beautifully sharp lenses can be found on ebay - just search for Hexanon AR.

Here's how it looks mounted - ultra compact

And here's a shot with it wide open - not too sharp but fine for portraits and low light work... and this lens is extremely sharp from f4 onwards.

G1 + 4/3rds adapter + Hexanon 40mm f1.8
1/125s f/1.8 at 40.0mm iso250

Kind Regards

Brian
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kernow Forum Pro • Posts: 12,441
Re: G1 + 4/3rds adapter + Hexanon 40mm f1.8

How much did you shim the Hexanon? I am using 2mm overall but I suspect it isn't necessary to be precise unless you want exact register distances.
--
Oll an gwella,
Jim

[LX1]

[FZ30] * IS/L B-300 * IS/L B-Macro * Minolta No. 0, No. 1 & No. 2 * Sunpak 383 * Benbo Trekker

[L1] * Olympus 25mm 2.8 * Hexanon 40mm 1.8 * Vivitar Series 1 135mm 2.3 * Tokina 500mm 8.0 *

OP Brian Mosley Forum Pro • Posts: 20,710
Ultra sharp results at f4...

This is from a burst of 5 shots at ISO 800, f4, 1/10sec handheld... combined in PhotoAcute to create a superresolution, noise free image.

Kind Regards

Brian
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OP Brian Mosley Forum Pro • Posts: 20,710
Exactly 1.5 mm I think. /nt
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kernow Forum Pro • Posts: 12,441
Re: Exactly 1.5 mm I think. /nt

Brian Mosley wrote:

OK, that must mean you used a single shim on the flange side rather than shimming the back of the flange as well. That is how I have mine done now but I am going to see if adding the .5mm shim improves things.
--
Oll an gwella,
Jim

ASR45
ASR45 Forum Pro • Posts: 37,028
Re: G1 + 4/3rds adapter + Hexanon 40mm f1.8

Looks good brian,

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m3
m3 Contributing Member • Posts: 945
Re: Ultra sharp results at f4...

Brian Mosley wrote:

This is from a burst of 5 shots at ISO 800, f4, 1/10sec handheld...
combined in PhotoAcute to create a superresolution, noise free image.

Please DO explain ...

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MaineTim Veteran Member • Posts: 3,086
Looks great, Brian...

I'm hoping mine will be here by the weekend, then we'll break out the jeweler's tools and see what's what. Any hints from you guys as to hidden traps when disassembling the lens?

Tim
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OP Brian Mosley Forum Pro • Posts: 20,710
Tips...

Hi Tim,

just be sure to use brand new, high quality screwdrivers... they need to be very sharp.

When you're unscrewing the screws, use the minimum downward force necessary - the threads are very fine, and the screw heads are soft metal - so if you press down too hard and turn the screwdriver you will charlie the screw head.

Make sure you have a large well lit flat space and work gently + slowly.

Did you google the Snaar website? Pete has some great instructions there.

Good Luck! email me if you get stuck

Kind Regards

Brian
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MaineTim Veteran Member • Posts: 3,086
Thanks...

for the tips, Brian. No, I hadn't seen that site, great info. I had looked at the fourthirdsphoto article on it. My biggest concern is just what you warned about, the removal of those screws. That's where it always seems to go wrong, so I'll tread carefully. Hard to believe clean copies of this lens can be had for as little as $10. I wish Nikon MF stuff was priced like that.

Tim
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KZ3 Forum Member • Posts: 92
Re: Tips...

I have a few Hexanon lenses, where can I get the shim from?
--
Jose Garzia

Dave Lewis Forum Pro • Posts: 10,425
Re: G1 + 4/3rds adapter + Hexanon 40mm f1.8

Looks plenty sharp to me. I have one of them and a 50 mm 1.7 neither of which I have gotten around to adapting. Wish someone did them professionally. I would ship them off to them.
--
Dave Lewis

Dave Lewis Forum Pro • Posts: 10,425
Re: Thanks...

I watched the prices of that lens go up to more than $50 for a while after a couple of these threads last winter. Folks listen and put the pressure on ebay.

dave

MaineTim wrote:

for the tips, Brian. No, I hadn't seen that site, great info. I had
looked at the fourthirdsphoto article on it. My biggest concern is
just what you warned about, the removal of those screws. That's where
it always seems to go wrong, so I'll tread carefully. Hard to believe
clean copies of this lens can be had for as little as $10. I wish
Nikon MF stuff was priced like that.

Tim
--
http://mainetim.zenfolio.com/

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Dave Lewis

kernow Forum Pro • Posts: 12,441
Re: Tips...

KZ3 wrote:

I have a few Hexanon lenses, where can I get the shim from?
--
Jose Garzia

If you mean the raw stock, most hobby shops stock brass sheet in various thicknesses. There are no ready made shims available, each is a custom job.
--
Oll an gwella,
Jim

kernow Forum Pro • Posts: 12,441
Re: Looks great, Brian...

MaineTim wrote:

I'm hoping mine will be here by the weekend, then we'll break out the
jeweler's tools and see what's what. Any hints from you guys as to
hidden traps when disassembling the lens?

Tim
--
http://mainetim.zenfolio.com/

Mark the orientation of each part as you disassemble the lens. I had no trouble with the screws, if a screw is stubborn, try turning it the opposite way as though tightening, it will usually break loose. I press very hard when removing the screws as it keeps better contact with the screw head. The aperture ring will be free to fall or get knocked off once you remove the chrome flange, there is a small detent ball bearing being pushed on by a leaf spring that can shoot out. It is easy to put back in but not easy to find. Leave a lens cap in place whilst working on the lens, a plastic bottle top can protect the rear element.
--
Oll an gwella,
Jim

Lamprecht Contributing Member • Posts: 864
Re: Looks great, Brian...

Is there no off-the-shelf adapter which will fit to the 4/3rds systems without having to go through all this work?

Richard

kernow Forum Pro • Posts: 12,441
Re: Looks great, Brian...

Lamprecht wrote:

Is there no off-the-shelf adapter which will fit to the 4/3rds
systems without having to go through all this work?

Richard

For 4/3 it would have to be only 2.0 mm thick, so not possible. However it is possible someone might make one for the m4/3 camera.
--
Oll an gwella,
Jim

OP Brian Mosley Forum Pro • Posts: 20,710
m4/3rds adapter is a very good possibility.

The Hexanon AR lenses have remained extremely good value so far, due to the need for DIY modification - a m4/3rds adapter would be awesome.

Recommended lenses
21mm f4
24mm f2.8
35mm f2.8
40mm f1.8
50mm f1.4 or 50mm f1.7 sharpest
57mm f1.4 or even better 57mm f1.2
85mm f1.8
135mm f3.2 or 135mm f2.5

Kind Regards

Brian
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Goffen
Goffen Veteran Member • Posts: 3,301
That extra shim.

Improves nothing, but you might get an exact infinity focus @ the end of the scale.

You will however always be able to get to infinity without it.

Goffen

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OP Brian Mosley Forum Pro • Posts: 20,710
And with the G1...

You get perfect focus confirmation via the EVF anyway - I'd keep it simple and forget the inside shim.

Kind Regards

Brian
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