GXR A12 + extension lenses (DW6, GW2, GT1, TC1, TCON14/14B)

Discussion about Ricoh GXR system

Re: GXR A12 + extension lenses (DW6, GW2, GT1, TC1)

Postby odklizec » Sun Jun 06, 2010 10:56 am

Thanks Sandy! And thanks also to you Jeremy! Where are my manners? ;)

BTW Sandy, I noticed you experienced some login problems? I got three ricohforum activation emails returned from the pacifier.com. The reason of undelivered emails was "unknown user"? So I activated your account manually. Are you sure the email associated with your account at ricohforum is valid?
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Re: GXR A12 + extension lenses (DW6, GW2, GT1, TC1)

Postby Marana » Mon Jun 07, 2010 5:33 am

Oh, I've recently changed email addresses, and was trying to change it here at the forum to the new email address. For some reason, it wasn't letting me. Thanks for activating me manually!
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Re: GXR A12 + extension lenses (DW6, GW2, GT1, TC1)

Postby odklizec » Tue Jun 08, 2010 11:17 am

Good news and bad news folks! I just received first of the bought lenses - TCON-14 (smaller one).

The good news is that it can be used with A12 extending its focal length to 72.5mm. The bad news is that it's useless with GRDIII. It's simply not big enough (front lens is not curved enough) to cover the entire frame without hard vignetting. Let's hope TCON-14B will work better? But I guess this will be at a cost of size and weight (maybe too much for GRDIII)?

As for the TCON-14 and A12, all you need is 40.5-43mm step-up ring or even better, 40.5-46mm ring. At the moment, I have to use two rings, 40.5-43 and 43-46mm, which is not really ideal. This combination adds touch of corner vignetting and softness to the output images. I'm pretty sure replacing two rings with just one 40.5-46mm ring will help a lot and eliminate the vignetting and maybe even corner softness?

The center of the image is very sharp. There is visible softness and chromatic aberration on the extreme corners, which I think is unimportant for the purpose of this lens combo. Definitely not softness. Chromatic aberration can always be fixed in editor. I still think that the major reason of both problems (CRA and corner softness) is the usage of two step rings.

The TCON-14 is made of plastic and looks and feels somewhat cheap (mainly if compared with luxury Ricoh converters). It comes with 43-46 ring (rear thread of TCON-14 is 46mm). It has also a very clever "quick release" system for mounting/unmounting the lens to/from the adapter tube or other lens with appropriate (46mm) thread. It makes it really easy to attach/detach without too much screwing.

I will take some photos of it later today and also photos taken with it to show you its performance (despite the two rings handicap).
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Re: GXR A12 + extension lenses (DW6, GW2, GT1, TC1, TCON14)

Postby odklizec » Wed Jun 09, 2010 12:35 am

Here is how the TCON14 looks attached on A12:
gxr_a12_tcon14.jpg
gxr_a12_tcon14.jpg (193.75 KiB) Viewed 6175 times


And as promised, here are some quick shots taken with A12+TCON-14.
R1098159_sm.jpg
R1098159_sm.jpg (401.66 KiB) Viewed 6183 times

EXIF-Data
Image taken on: Tue Jun 08, 2010 1:42 pm
Focus length: 33 mm
Shutter speed: 1/310 Sec
F-number: F/8
ISO speed rating: 200
Whitebalance: Manual
Flash: Flash did not fire, compulsory flash mode
Camera-model: GXR A12
Exposure program: Aperture priority
Exposure bias: -7/10 EV
Metering mode: Pattern
The full size version of the above shot can be seen here:
http://www.flickr.com/photos/odklizec/4 ... 3/sizes/o/

As you can see, there is some corner vignetting and softness visible even in 4:3 mode. But in my opinion, it's caused by two stacked step-up rings instead of just one. In any case, it's not a problem most of the time.

Some more examples, most of them with my usual model ;) All out of camera JPEG.
R1098169_sm.jpg
R1098169_sm.jpg (330.45 KiB) Viewed 6176 times

EXIF-Data
Image taken on: Tue Jun 08, 2010 1:45 pm
Focus length: 33 mm
Shutter speed: 1/45 Sec
F-number: F/4.5
ISO speed rating: 400
Whitebalance: Manual
Flash: Flash did not fire, compulsory flash mode
Camera-model: GXR A12
Exposure program: Aperture priority
Exposure bias: 0 EV
Metering mode: Pattern

R1098214_sm.jpg
R1098214_sm.jpg (345.09 KiB) Viewed 6172 times

EXIF-Data
Image taken on: Tue Jun 08, 2010 2:03 pm
Focus length: 33 mm
Shutter speed: 1/125 Sec
F-number: F/4.5
ISO speed rating: 200
Whitebalance: Manual
Flash: Flash did not fire, compulsory flash mode
Camera-model: GXR A12
Exposure program: Aperture priority
Exposure bias: 7/10 EV
Metering mode: Pattern

R1098162_sm.jpg
R1098162_sm.jpg (433.16 KiB) Viewed 6156 times

EXIF-Data
Image taken on: Tue Jun 08, 2010 1:43 pm
Focus length: 33 mm
Shutter speed: 1/143 Sec
F-number: F/8
ISO speed rating: 200
Whitebalance: Manual
Flash: Flash did not fire, compulsory flash mode
Camera-model: GXR A12
Exposure program: Aperture priority
Exposure bias: -2/5 EV
Metering mode: Pattern

R1098259_sm.jpg
R1098259_sm.jpg (509.88 KiB) Viewed 6158 times

EXIF-Data
Image taken on: Tue Jun 08, 2010 3:02 pm
Focus length: 33 mm
Shutter speed: 1/176 Sec
F-number: F/4
ISO speed rating: 400
Whitebalance: Manual
Flash: Flash did not fire, compulsory flash mode
Camera-model: GXR A12
Exposure program: Aperture priority
Exposure bias: 0 EV
Metering mode: Center-weighted average

R1098244_sm.jpg
R1098244_sm.jpg (571.66 KiB) Viewed 6166 times

EXIF-Data
Image taken on: Tue Jun 08, 2010 2:42 pm
Focus length: 33 mm
Shutter speed: 1/97 Sec
F-number: F/4
ISO speed rating: 800
Whitebalance: Manual
Flash: Flash did not fire, compulsory flash mode
Camera-model: GXR A12
Exposure program: Aperture priority
Exposure bias: 3/10 EV
Metering mode: Center-weighted average

R1098220_sm.jpg
R1098220_sm.jpg (598.25 KiB) Viewed 6157 times

EXIF-Data
Image taken on: Tue Jun 08, 2010 2:20 pm
Focus length: 33 mm
Shutter speed: 1/570 Sec
F-number: F/2.5
ISO speed rating: 800
Whitebalance: Manual
Flash: Flash did not fire, compulsory flash mode
Camera-model: GXR A12
Exposure program: Aperture priority
Exposure bias: 7/10 EV
Metering mode: Center-weighted average

R1098233_sm.jpg
R1098233_sm.jpg (600.19 KiB) Viewed 6130 times

EXIF-Data
Image taken on: Tue Jun 08, 2010 2:28 pm
Focus length: 33 mm
Shutter speed: 1/84 Sec
F-number: F/3.2
ISO speed rating: 800
Whitebalance: Manual
Flash: Flash did not fire, compulsory flash mode
Camera-model: GXR A12
Exposure program: Aperture priority
Exposure bias: 3/10 EV
Metering mode: Center-weighted average

R1098250_sm.jpg
R1098250_sm.jpg (621.58 KiB) Viewed 6100 times

EXIF-Data
Image taken on: Tue Jun 08, 2010 2:57 pm
Focus length: 33 mm
Shutter speed: 1/32 Sec
F-number: F/4
ISO speed rating: 800
Whitebalance: Manual
Flash: Flash did not fire, compulsory flash mode
Camera-model: GXR A12
Exposure program: Aperture priority
Exposure bias: 3/10 EV
Metering mode: Center-weighted average

R1098247_sm.jpg
R1098247_sm.jpg (635.25 KiB) Viewed 6122 times

EXIF-Data
Image taken on: Tue Jun 08, 2010 2:43 pm
Focus length: 33 mm
Shutter speed: 1/104 Sec
F-number: F/4
ISO speed rating: 800
Whitebalance: Manual
Flash: Flash did not fire, compulsory flash mode
Camera-model: GXR A12
Exposure program: Aperture priority
Exposure bias: 3/10 EV
Metering mode: Center-weighted average

R1098243_sm.jpg
R1098243_sm.jpg (641.22 KiB) Viewed 6105 times

EXIF-Data
Image taken on: Tue Jun 08, 2010 2:41 pm
Focus length: 33 mm
Shutter speed: 1/55 Sec
F-number: F/4
ISO speed rating: 800
Whitebalance: Manual
Flash: Flash did not fire, compulsory flash mode
Camera-model: GXR A12
Exposure program: Aperture priority
Exposure bias: 3/10 EV
Metering mode: Center-weighted average


The A12 AF works OK with TCON14 (unlike with GT1 or TC1). Thanks to small depth of field is necessary to be careful about correct focus. But once focused correctly, it can give you some pretty usable results. Of course, you need a model who is willing to stay still for a moment or two ;) I think it's most useful extension lens for portraits. I guess the upcoming TCON-14B will be even better, but it will be big and heavy addition to A12.
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Re: GXR A12 + extension lenses (DW6, GW2, GT1, TC1, TCON14)

Postby Muddy » Wed Jun 09, 2010 3:36 am

Lovely shots of Lucia, she's really growing up and getting more professional now :D. Thanks for all the info.
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Re: GXR A12 + extension lenses (DW6, GW2, GT1, TC1, TCON14/14B)

Postby odklizec » Thu Jun 17, 2010 3:18 pm

I finally got the Olympus TCON14B (1.45x) I won two weeks ago on ebay. I hoped it would be even more useful than TCON14 and that it would be usable also with GRDIII as a replacement tele lens for GT-1. I knew it's big lens, but only now I see how gigantic it is! Even if it would usable with GRDIII, nobody sane would probably use it because it's much bigger and heavier then GRDIII. It's actually heavier than GXR+A12! It's so big and heavy that it's weird to use also with GXR. In fact, I think it could be dangerous to use with A12. I mean dangerous for A12 focus mechanism. TCON14B is just too heavy to be mounted on the A12 lens and moved by A12 focus motor. A12 can still autofocus and manual focus is not a problem either. But I guess the A12 focus mechanism could wear off very quickly.

I mounted it on A12 using two stacked step-up rings (40.5-52mm and 52-62mm). TCON14B produces some vignetting visible in 3:2 mode, but it's gone in 4:3. Extreme corners are slightly soft even in 4:3 mode. But much better than corners produced by TCON14. As in case of TCON14, I'm using two stacked rings, which I think is the cause of vignetting and maybe also soft corners. Unfortunately, as far as I know, there is no 40.5-62mm step-up ring available.

Here you can see how gigantic is the TCON14B mounted on A12. Weight of GXR+A12 is around 440g, weight of TCON14B alone is 460g ;)
_1091371_sm.jpg
_1091371_sm.jpg (328.57 KiB) Viewed 6042 times

EXIF-Data
Image taken on: Thu Jun 17, 2010 12:25 pm
Focus length: 6 mm
Shutter speed: 1/15 Sec
F-number: F/3.2
ISO speed rating: 200
Whitebalance: Manual
Flash: Flash did not fire, compulsory flash mode
Camera-model: GR DIGITAL 3
Exposure program: Aperture priority
Exposure bias: -1/1 EV
Metering mode: Pattern

_1091373_sm.jpg
_1091373_sm.jpg (359.33 KiB) Viewed 6474 times

EXIF-Data
Image taken on: Thu Jun 17, 2010 12:30 pm
Focus length: 6 mm
Shutter speed: 1/12 Sec
F-number: F/4
ISO speed rating: 100
Whitebalance: Manual
Flash: Flash did not fire, compulsory flash mode
Camera-model: GR DIGITAL 3
Exposure program: Aperture priority
Exposure bias: -3/10 EV
Metering mode: Pattern


Here are some shots taken with TCON14B...
R1098696_sm.jpg
R1098696_sm.jpg (467.46 KiB) Viewed 6028 times

EXIF-Data
Image taken on: Thu Jun 17, 2010 12:44 pm
Focus length: 33 mm
Shutter speed: 1/410 Sec
F-number: F/8
ISO speed rating: 200
Whitebalance: Manual
Flash: Flash did not fire, compulsory flash mode
Camera-model: GXR A12
Exposure program: Aperture priority
Exposure bias: -7/10 EV
Metering mode: Pattern

R1098641_sm.jpg
R1098641_sm.jpg (589.78 KiB) Viewed 6043 times

EXIF-Data
Image taken on: Wed Jun 16, 2010 2:17 pm
Focus length: 33 mm
Shutter speed: 1/64 Sec
F-number: F/2.8
ISO speed rating: 800
Whitebalance: Manual
Flash: Flash did not fire, compulsory flash mode
Camera-model: GXR A12
Exposure program: Aperture priority
Exposure bias: 3/10 EV
Metering mode: Center-weighted average

R1098614_sm.jpg
R1098614_sm.jpg (309.16 KiB) Viewed 6020 times

EXIF-Data
Image taken on: Wed Jun 16, 2010 1:16 pm
Focus length: 33 mm
Shutter speed: 1/34 Sec
F-number: F/5
ISO speed rating: 800
Whitebalance: Manual
Flash: Flash did not fire, compulsory flash mode
Camera-model: GXR A12
Exposure program: Aperture priority
Exposure bias: -1/1 EV
Metering mode: Center-weighted average

R1098530_sm.jpg
R1098530_sm.jpg (627.89 KiB) Viewed 6014 times

EXIF-Data
Image taken on: Wed Jun 16, 2010 9:10 am
Focus length: 33 mm
Shutter speed: 1/97 Sec
F-number: F/2.5
ISO speed rating: 200
Whitebalance: Manual
Flash: Flash did not fire, compulsory flash mode
Camera-model: GXR A12
Exposure program: Aperture priority
Exposure bias: 3/10 EV
Metering mode: Center-weighted average

R1098626_sm.jpg
R1098626_sm.jpg (614.44 KiB) Viewed 6008 times

EXIF-Data
Image taken on: Wed Jun 16, 2010 1:34 pm
Focus length: 33 mm
Shutter speed: 1/34 Sec
F-number: F/6.3
ISO speed rating: 400
Whitebalance: Manual
Flash: Flash did not fire, compulsory flash mode
Camera-model: GXR A12
Exposure program: Aperture priority
Exposure bias: 7/10 EV
Metering mode: Center-weighted average

R1098656_sm.jpg
R1098656_sm.jpg (675.54 KiB) Viewed 6012 times

EXIF-Data
Image taken on: Wed Jun 16, 2010 2:58 pm
Focus length: 33 mm
Shutter speed: 1/64 Sec
F-number: F/2.5
ISO speed rating: 800
Whitebalance: Manual
Flash: Flash did not fire, compulsory flash mode
Camera-model: GXR A12
Exposure program: Aperture priority
Exposure bias: 0 EV
Metering mode: Center-weighted average

R1098654_sm.jpg
R1098654_sm.jpg (472.19 KiB) Viewed 5998 times

EXIF-Data
Image taken on: Wed Jun 16, 2010 2:44 pm
Focus length: 33 mm
Shutter speed: 1/290 Sec
F-number: F/2.5
ISO speed rating: 1600
Whitebalance: Manual
Flash: Flash did not fire, compulsory flash mode
Camera-model: GXR A12
Exposure program: Aperture priority
Exposure bias: 3/10 EV
Metering mode: Center-weighted average

R1098586_sm.jpg
R1098586_sm.jpg (522.76 KiB) Viewed 6004 times

EXIF-Data
Image taken on: Wed Jun 16, 2010 1:06 pm
Focus length: 33 mm
Shutter speed: 1/97 Sec
F-number: F/2.5
ISO speed rating: 800
Whitebalance: Manual
Flash: Flash did not fire, compulsory flash mode
Camera-model: GXR A12
Exposure program: Aperture priority
Exposure bias: -1/1 EV
Metering mode: Center-weighted average
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Re: GXR A12 + extension lenses (DW6, GW2, GT1, TC1, TCON14/14B)

Postby odklizec » Wed Jun 30, 2010 12:09 am

Yesterday, I received the 40.5 to 46 step-up ring so I could dump the "two-rings" solution (used with TCON14) with just one ring. As I expected, it dramatically improved the vignetting and corner sharpness. There is still some vignetting visible in 3:2 mode, but it's nearly gone in 4:3 and the corners are visibly sharper too.
R1098721_sm.jpg
TCON14 + 40.5 to 43 and 43 to 46 rings.
R1098721_sm.jpg (354.74 KiB) Viewed 5945 times

EXIF-Data
Image taken on: Mon Jun 28, 2010 6:27 pm
Focus length: 33 mm
Shutter speed: 1/250 Sec
F-number: F/8
ISO speed rating: 200
Whitebalance: Manual
Flash: Flash did not fire, compulsory flash mode
Camera-model: GXR A12
Exposure program: Aperture priority
Exposure bias: -3/5 EV
Metering mode: Center-weighted average
Full size photo:
http://www.flickr.com/photos/odklizec/4 ... otostream/
R1098715_sm.jpg
TCON14 + 40.5 to 46 ring.
R1098715_sm.jpg (369.74 KiB) Viewed 5949 times

EXIF-Data
Image taken on: Mon Jun 28, 2010 6:24 pm
Focus length: 33 mm
Shutter speed: 1/270 Sec
F-number: F/8
ISO speed rating: 200
Whitebalance: Manual
Flash: Flash did not fire, compulsory flash mode
Camera-model: GXR A12
Exposure program: Aperture priority
Exposure bias: -3/5 EV
Metering mode: Center-weighted average
Full size photo:
http://www.flickr.com/photos/odklizec/4 ... otostream/

Now this makes the TCON14 usable with A12. It's smaller and lighter tele extension solution than TCON14B. 14B appears to deliver somewhat better image quality. But the size and weight of TCON14 is simply much more usable.
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Re: GXR A12 + extension lenses (DW6, GW2, GT1, TC1, TCON14/14B)

Postby CHICHORNIO » Fri Nov 05, 2010 8:21 pm

Pavel,
If I undestood well your post, If I buy the GXR+A12 50mm system, I will be able to use my GT-1 from my GRD2? (to have an almost 92mm tele lens). That will be a good option for portrait!
And what about my GW-1 (0.75x factor)? Can I use it attached to the A12 50 mm module so I can go down to I think 35mm? I´m very lazy in this kind of things... please help!
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Re: GXR A12 + extension lenses (DW6, GW2, GT1, TC1, TCON14/14B)

Postby odklizec » Fri Nov 05, 2010 11:58 pm

Yes, you can use GT-1 with A12 50mm. But you need to get the 40.5 to 37mm step down ring to be able to do that. BTW, mounting GT-1 in front of A12 50mm will give you 71.5mm not 92mm! And I'm afraid, there are some downsides (depends on what you want to achieve).

The main problem is the image softness of this Frankenstein lens combo. It's so soft that it makes the AF completely unusable! And because it's so soft, it's definitely not usable in all situations. On the other hand, it's great for creative photography. It gives the images a lensbaby-like look. Just check some samples here (scroll down to GT1 samples):
viewtopic.php?f=60&t=4164
or here:
viewtopic.php?p=19294#p19294
and here:
viewtopic.php?f=60&t=4663

As for using GW-1, I don't have this lens, so I can't tell you for sure its worth of something or not. But considering its smaller rear lens element (if compared with GW-2) and knowing that GW-2 mounted on A12 50mm produces very soft corners, I would not expect anything good from GW-1.
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