GXR P10 + extension lenses test (GT1, TC1, TCON14)

Discussion about Ricoh GXR system

GXR P10 + extension lenses test (GT1, TC1, TCON14)

Postby odklizec » Sat Nov 13, 2010 2:55 am

This test is only a quick and dirty addition to excellent Gerd's experiment with P10 and some Ricoh converter lenses available here:
http://www.waloszek.de/gxr_conv_e.php

By default, P10 is incapable of using converter lenses. Although both P10 and S10 share nearly identical lens cap mount, small protrusions on the P10 mount prevents the HA3 tube to be mounted on the P10 module. I was in an adventurous mood today and I decided to try adapt the HA3 for P10 mount. All it required was smooth file, some patience and a bit of luck ;) Now I can attach the HA3 on the P10 and it still works fine also with S10. However, this alone is only a first step!

The major reason why Ricoh probably prevented the HA3 to be mounted on the P10 is the fact, that if the lens is fully extended to 300 mm, it's slightly longer than the HA3 and therefore, it's impossible to attach anything on the HA3. Of course, you can mount anything on the HA3 before extending the lens. But if you extend the lens to max, it will hit the rear part of attached lens or filter and this may lead to damage of the P10 lens mechanism. So what it needs is a bit of extension. I think a simple 43-43mm spacer (or two) spacer would do the job?

Sadly, I currently don't have any spacer to try with Ricoh lenses. On a positive note, I have a 43-46 ring that was delivered with Olympus TCON14. And it works very well as the required length extension for HA3! So I was able to mount TCON14 in front of fully extended P10 lens maximizing its focal length to 435mm! And to my great surprise, it works very well!
R1100037_sm_300mm.jpg
P10 at 300mm (no extension installed)
R1100037_sm_300mm.jpg (821.87 KiB) Viewed 12767 times

EXIF-Data
Image taken on: Fri Nov 12, 2010 2:33 pm
Focus length: 52.5 mm
Shutter speed: 1/203 Sec
F-number: F/5.6
ISO speed rating: 100
Whitebalance: Manual
Flash: Flash did not fire, compulsory flash mode
Camera-model: GXR P10
Exposure program: Aperture priority
Exposure bias: -3/10 EV
Metering mode: Center-weighted average

R1100039_sm_tcon14.jpg
P10 at 300mm + TCON14 (1.45x)
435mm
R1100039_sm_tcon14.jpg (845.11 KiB) Viewed 12898 times

EXIF-Data
Image taken on: Fri Nov 12, 2010 2:34 pm
Focus length: 52.5 mm
Shutter speed: 1/203 Sec
F-number: F/5.6
ISO speed rating: 100
Whitebalance: Manual
Flash: Flash did not fire, compulsory flash mode
Camera-model: GXR P10
Exposure program: Aperture priority
Exposure bias: -3/10 EV
Metering mode: Center-weighted average

R1100025_sm_gt1.jpg
P10 at 300mm + hand held GT1 (1.43x)
429mm
R1100025_sm_gt1.jpg (527.15 KiB) Viewed 13221 times

EXIF-Data
Image taken on: Fri Nov 12, 2010 2:21 pm
Focus length: 52.5 mm
Shutter speed: 1/133 Sec
F-number: F/5.6
ISO speed rating: 100
Whitebalance: Manual
Flash: Flash did not fire, compulsory flash mode
Camera-model: GXR P10
Exposure program: Aperture priority
Exposure bias: -3/10 EV
Metering mode: Center-weighted average

R1100026_sm_tc1.jpg
P10 at 300mm + hand held TC1 (1.88x)
564mm
R1100026_sm_tc1.jpg (527.24 KiB) Viewed 13315 times

EXIF-Data
Image taken on: Fri Nov 12, 2010 2:22 pm
Focus length: 52.5 mm
Shutter speed: 1/111 Sec
F-number: F/5.6
ISO speed rating: 100
Whitebalance: Manual
Flash: Flash did not fire, compulsory flash mode
Camera-model: GXR P10
Exposure program: Aperture priority
Exposure bias: -3/10 EV
Metering mode: Center-weighted average

As you can see, both GT1 and TC1 are completely worthless, except for creating "lensbaby-like" effect I described >here<.

TCON14, on the other hand, seems to be very usable. Of course, there is some corner softness and pronounced chromatic aberration. But nothing dramatic as in case of GT1/TC1. Generally, it works very well.

There are, of course, also some drawbacks. First is the size of entire combo, second is the problematic usability in anything but good light. 435mm is simply too long for handheld shots and f5.6 at 300mm does not help either.

Tomorrow, I will try to take and post some more examples and a detail of adapted HA3.

UPDATE:
Here is how the TCON14 look attached on P10:
_1092318_tcon14.jpg
_1092318_tcon14.jpg (167.1 KiB) Viewed 12572 times

And here is the gigantic TCON14b:
_1092318_tcon14b.jpg
_1092318_tcon14b.jpg (178.28 KiB) Viewed 12596 times

TCON14b delivers somewhat better image quality than TCON14. But because of its size and weight, its practically useless.

Here is a comparison of P10 (on left) and S10 extension mount. The little protrusion on the P10 prevents the HA3 to be mounted on.
_1092308_p10_mount_detail.png
_1092308_p10_mount_detail.png (185.3 KiB) Viewed 12647 times


If you are an adventurous type, you can try to adapt the HA3 with smooth file. Below you can see the places you need to take care of. All you need to do is to lower the profile of all these places. Do it in a little steps and always try the HA3 on P10 before next round of filling.
BTW, I'm not responsible on any damage you may do to HA3 or P10! ;)
_1092310_ha3.jpg
_1092310_ha3.jpg (298.67 KiB) Viewed 12644 times
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Re: GXR P10 + extension lenses test (GT1, TC1, TCON14)

Postby burdicb » Sat Nov 13, 2010 5:31 am

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love your adventurous spirit with extension lenses. Today I went the other way and mounted my Oly on my new 28mm lens to see how it would work. It is night time, so thought I would shoot high Iso at the kitchen and dog for fun.
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Re: GXR P10 + extension lenses test (GT1, TC1, TCON14)

Postby anthony_mazzeri » Sat Nov 13, 2010 11:30 am

odklizec wrote:On a positive note, I have a 43-46 ring that was delivered with Olympus TCON14. And it works very well as the required length extension for HA3! So I was able to mount TCON14 in front of fully extended P10 lens maximizing its focal length to 435mm! And to my great surprise, it works very well!


Excellent work, Pavel! And Gerd too!

So the question is a quick ebay search shows there are Olympus TCON-14B or TCON-14D etc versions, so which is the one we need?
EDIT - never mind, I see in your other thread yours is the 14 with the 46mm thread. The 14B is the big one with 62mm.


burdicb wrote:
R0011067.jpg
R0011074.jpg
love your adventurous spirit with extension lenses. Today I went the other way and mounted my Oly on my new 28mm lens to see how it would work. It is night time, so thought I would shoot high Iso at the kitchen and dog for fun.


So this is the same TCON-14 as Pavel used? It makes the 28mm into a 40mm (x1.45)?
Last edited by anthony_mazzeri on Sat Nov 13, 2010 1:38 pm, edited 2 times in total.
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Re: GXR P10 + extension lenses test (GT1, TC1, TCON14)

Postby burdicb » Sat Nov 13, 2010 11:41 am

This is going the other way using the Oly WCON 07
Link: http://www.normancamera.com/OLYMPUS-WCO ... -LENS.html

It essentially turns the 50mm into a 35mm and the 28 into a 20mm. may be more bother than useful for many, but I had it laying around from my first generation digital some years ago.

Regards,
Brad
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Re: GXR P10 + extension lenses test (GT1, TC1, TCON14)

Postby anthony_mazzeri » Sat Nov 13, 2010 12:43 pm

Thanks, I thought that looked wider so I was getting confused. It's a good to know there's viable option to get a wide angle on a GXR APS-C module instead of just on the S10 with the DW-6 at 19mm. Ricoh makes the GW-2 for the GRD III to 21mm so there must be some demand for it amngst 28mm users. And many people (I think Pavel himself too) have expressed a desire for a 35-40mm APS-C module so this would make them happy.
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Re: GXR P10 + extension lenses test (GT1, TC1, TCON14)

Postby anthony_mazzeri » Sat Nov 13, 2010 1:25 pm

odklizec wrote:T43-46 ring that was delivered with Olympus TCON14.


After a bit of googling, just confirming the 43-46mm adapter is the CLA-8, which doesn't appear to be listed as a current product on Olympus' site, but does look to still be available at online retailers.

Brad, how have you attached the WCON-07 to the A12? It says on Olympus's site that it needs a 55m adapter but I can't tell from their sparse info which one is a 40.5-55mm adapter. The CLA-4 I can see from the image is a 45.6-55mm.
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Re: GXR P10 + extension lenses test (GT1, TC1, TCON14)

Postby odklizec » Sat Nov 13, 2010 2:13 pm

Good idea Burd! I'm planning to try the extension lenses I own with A12 28mm too. But I doubt any of the tele lenses will actually work. 28mm is just too wide and it's extremely hard to design an extension lens for that focal length. GT-1 for GRDII was full of compromises and it worked only on GRDII. When attached on GRDIII (via a step-down ring) it produces heavy corner softness not suitable for anything useful. And I expect the same result with A12 28mm. And TCON14 is not enough wide and flat and produces visible dark circle cover large part of image. As if you attach TC1 on GX200/S10 without fully zooming the lens. So this lens is clearly not optimized to be attached on 28mm lens.

Anyway, your test proved that at least the wide extensions lenses could be useful with A12 28mm? How are the corners with attached wcon-07? They look OK on these small samples.

Anthony, the TCON I used in this test was TCON14, the smaller lighter TCON (body made of plastic). TCON14B delivers superior image, but it's too big and heavy to be really useful with GXR. I may give it a try with P10, just to confirm or deny its superiority against the TCON14. But I cannot imagine a reason why I would like to carry or use this mastodon. It's bulkier and heavier than entire GXR+P10 combo :D

TCON-14 is often sold at ebay and some time ago there was a big sale on warehouseexress.com for just 9.99GBP! But it seems it's gone now ;) BTW the TCON-14D you mentioned is for Oly 8080 and I don't have any clue if it would work (how good or bad) with GXR!
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Re: GXR P10 + extension lenses test (GT1, TC1, TCON14)

Postby burdicb » Sat Nov 13, 2010 3:22 pm

Anthony: the stepdown ring is from 55mm to 40.5 and seems to work just fine. The WCON .7 is pretty heavy so I definitely hold the lens while focusing.

Pavel: As I received the lens last night (Colorado time) I really have not had a chance to take it outside. we are supposed to have snow today, so may or may not get my chance to experiment.

In any case, the 28mm is a little gem of a lens, and i can see that as staying on the camera for much of the time! Pavel, again, thanks for experimenting with the longer lens idea, hope they see that we are trying to be creative with the options they have given us!
Best to you both
Brad
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Re: GXR P10 + extension lenses test (GT1, TC1, TCON14)

Postby burdicb » Sat Nov 13, 2010 5:23 pm

/attachment]
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I shoot a lot of 1:1 so the 20mm setting may work for that. I see some fall off in the corners, and it is definitely light sensitive, but fun as well.
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Re: GXR P10 + extension lenses test (GT1, TC1, TCON14)

Postby burdicb » Sat Nov 13, 2010 6:08 pm

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28 mm samples showing roughly same content
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