Teleconverter + Mirror Lens
Posted 18/02/2010 - 12:34
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It'll be awful! I have the same lens, and tried out the Pentax 1.7x AF adapter on it (generally regarded as an excellent TC). Results were lousy (soft and purple fringing)
In general a TC will expose any of the flaws of the lens, so usually you'd only use one with a top quality (e.g. mucho dinero) long prime.
On its own the lens is very good, considering the price and the fact that it's a mirror. I'm very pleased with mine!
In general a TC will expose any of the flaws of the lens, so usually you'd only use one with a top quality (e.g. mucho dinero) long prime.
On its own the lens is very good, considering the price and the fact that it's a mirror. I'm very pleased with mine!
Tim
AF - Pentax K5, Sigma 10-20/4-5.6, Tamron 17-50/2.8, Sigma 30/1.4, Sigma 70-200/2.8, Tamron 70-300/4-5.6
MF - Vivitar CF 28/2.8, Tamron AD2 90/2.5, MTO 1000/11
Stuff - Metz 58 AF1, Cactus v4, Nikon SB24, Raynox 150, Sigma 1.4x TC, Sigma 2x TC, Kenko 2x macro TC, Redsnapper 283 tripod, iMac 27”, Macbook Pro 17”, iPad, iPhone 3G
Flickr • Fluidr • PPG • Street • Portfolio site
Feel free to edit any of my posted photos! If I post a photo for critique, I want brutal honesty. If you don't like it, please say so and tell me why!
AF - Pentax K5, Sigma 10-20/4-5.6, Tamron 17-50/2.8, Sigma 30/1.4, Sigma 70-200/2.8, Tamron 70-300/4-5.6
MF - Vivitar CF 28/2.8, Tamron AD2 90/2.5, MTO 1000/11
Stuff - Metz 58 AF1, Cactus v4, Nikon SB24, Raynox 150, Sigma 1.4x TC, Sigma 2x TC, Kenko 2x macro TC, Redsnapper 283 tripod, iMac 27”, Macbook Pro 17”, iPad, iPhone 3G
Flickr • Fluidr • PPG • Street • Portfolio site
Feel free to edit any of my posted photos! If I post a photo for critique, I want brutal honesty. If you don't like it, please say so and tell me why!
Posted 18/02/2010 - 12:34
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Have tested mine with a 2x converter on, the IQ is`nt bad but actually using it is a nightmare, you will need a sturdy tripod and give it time to settle down once focussed; the slightest breath of wind or any movement shows as blurr. Will publish a few test shots tommorrow if somebody else does not beat me to it.
Davex.
Davex.
Posted 18/02/2010 - 12:39
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F8 with a 2xTC will be F16 which will be pretty dim. I suspect you would end up with soft photos too. I read somewhere that Mirror lenses and TCs don't go well together.
Posted 18/02/2010 - 12:57
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Hrm, gotcha - thanks for the heads up folks!
K-5; Siggy 10-20 f4, 30mm f1.4, 18-50mm f2.8, 70-200mm f2.8; Tammy 400mm f4, 500mm f8
Posted 18/02/2010 - 13:38
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Probably too soft for confort. Focusing would be a very hard since you cut the light, double FL and still have a small DOF.
I've tried with poor results, but there wasn't very much light, nor very good stabilization.
Purple fringing would be the fault of the TC probably, not the lens.
I've tried with poor results, but there wasn't very much light, nor very good stabilization.
Purple fringing would be the fault of the TC probably, not the lens.
Posted 18/02/2010 - 13:50
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edumad wrote:
I've tried with poor results, but there wasn't very much light, nor very good stabilization.
Ah yes, something else to consider. The Shake Reduction settings only go as high as 800mm, so with a 2x TC it might not be so precise.
I've tried with poor results, but there wasn't very much light, nor very good stabilization.
Tim
AF - Pentax K5, Sigma 10-20/4-5.6, Tamron 17-50/2.8, Sigma 30/1.4, Sigma 70-200/2.8, Tamron 70-300/4-5.6
MF - Vivitar CF 28/2.8, Tamron AD2 90/2.5, MTO 1000/11
Stuff - Metz 58 AF1, Cactus v4, Nikon SB24, Raynox 150, Sigma 1.4x TC, Sigma 2x TC, Kenko 2x macro TC, Redsnapper 283 tripod, iMac 27”, Macbook Pro 17”, iPad, iPhone 3G
Flickr • Fluidr • PPG • Street • Portfolio site
Feel free to edit any of my posted photos! If I post a photo for critique, I want brutal honesty. If you don't like it, please say so and tell me why!
AF - Pentax K5, Sigma 10-20/4-5.6, Tamron 17-50/2.8, Sigma 30/1.4, Sigma 70-200/2.8, Tamron 70-300/4-5.6
MF - Vivitar CF 28/2.8, Tamron AD2 90/2.5, MTO 1000/11
Stuff - Metz 58 AF1, Cactus v4, Nikon SB24, Raynox 150, Sigma 1.4x TC, Sigma 2x TC, Kenko 2x macro TC, Redsnapper 283 tripod, iMac 27”, Macbook Pro 17”, iPad, iPhone 3G
Flickr • Fluidr • PPG • Street • Portfolio site
Feel free to edit any of my posted photos! If I post a photo for critique, I want brutal honesty. If you don't like it, please say so and tell me why!
Posted 19/02/2010 - 09:07
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A few images for comparrison;
This is DA 55-300 set to 250mm + 2x teleconvertor;
I think the whitish fog on the left is due to me shooting through an open window.
This is Tokina 500mm Mirror;
This is Tokina 500mm Mirror + 2x teleconvertor;
All treated the same in PS, everything manual on camera.
Davex.
This is DA 55-300 set to 250mm + 2x teleconvertor;
I think the whitish fog on the left is due to me shooting through an open window.
This is Tokina 500mm Mirror;
This is Tokina 500mm Mirror + 2x teleconvertor;
All treated the same in PS, everything manual on camera.
Davex.
Posted 19/02/2010 - 09:18
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Hmmm - I also own the Tamron 500mm mirror and have been very pleased with it. Used with care you can get great and sharp results - good enough to get in PPG for me. I'm surprised by the Tokina shot above. They also have a good reputation and I would have expected much better. Looks like something is not right to me.
Posted 19/02/2010 - 09:21
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Quote:
Looks like something is not right to me
Have wondered about this since I got it, It looks unused but it does seem to have almost a misty feel to the images it produces. I only got it for moon shots, have yet to see the moon Looks like something is not right to me
Davex
Posted 19/02/2010 - 11:04
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A couple of shots - taken rather quickly using a Pentax M 400-600 mirror and and Ax2S teleconverter. Saved in camera as a 2Mp *** JPG and uploaded immediately.
K20D on a tripod - but the floor moves as soon as a sparrow threaten to flap its wings. A little breezy which did not help either and to be honest they are awful pictures which shows some of the problems you can get- too many branches just out of focus and in the way along with some blurring from minuscule amounts of movement.
On a nice bright sunny day though - they can be a lot better
Jay - at around 50 metres and if you zoom in closely you can see the three claws on one foot.
[IMG]http://i2.photobucket.com/albums/y31/Polchraine/PentaxForum/Jay.jpg[/IMG]
Birdbox at 45 metres
[IMG]http://i2.photobucket.com/albums/y31/Polchraine/PentaxForum/BirdBox.jpg[/IMG]
K20D on a tripod - but the floor moves as soon as a sparrow threaten to flap its wings. A little breezy which did not help either and to be honest they are awful pictures which shows some of the problems you can get- too many branches just out of focus and in the way along with some blurring from minuscule amounts of movement.
On a nice bright sunny day though - they can be a lot better
Jay - at around 50 metres and if you zoom in closely you can see the three claws on one foot.
[IMG]http://i2.photobucket.com/albums/y31/Polchraine/PentaxForum/Jay.jpg[/IMG]
Birdbox at 45 metres
[IMG]http://i2.photobucket.com/albums/y31/Polchraine/PentaxForum/BirdBox.jpg[/IMG]
.
K20D, *istD, MZ-S, Super-A, ME Super, MX
DA* 16-50, DA* 50-135, DA* 300,
DA 50-200, FA 24-90, FA 20-35,
M 400-600, A 50 f1.4, A 28 f2.8, A 70-210, M 35-80, M 50 f1.7
A x2S teleconverter and a few others ...
K20D, *istD, MZ-S, Super-A, ME Super, MX
DA* 16-50, DA* 50-135, DA* 300,
DA 50-200, FA 24-90, FA 20-35,
M 400-600, A 50 f1.4, A 28 f2.8, A 70-210, M 35-80, M 50 f1.7
A x2S teleconverter and a few others ...
Posted 19/02/2010 - 12:35
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Really like this shot.
If you can't say something nice about Pentax, you won't say anything at all.
Apparently.
Apparently.
Posted 19/02/2010 - 21:23
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Wow, what a pic of that crazy looking bird! I've only had my Tamron for 4 days now and only been able to go out today for pictures - but so far I'm impressed and there's none of that milkiness on mine either. All of my shots are handheld BTW, so that's why they're not quite as crisp as they could be. I don't own a monopod and I'm not gonna walk around with a tripod
[IMG]http://img28.imageshack.us/img28/1470/imgp7595.jpg[/IMG]
[IMG]http://img203.imageshack.us/img203/3996/imgp7586.jpg[/IMG]
[IMG]http://img718.imageshack.us/img718/6902/imgp7580.jpg[/IMG]
[IMG]http://img175.imageshack.us/img175/7121/imgp7531k.jpg[/IMG]
[IMG]http://img85.imageshack.us/img85/5323/imgp7490.jpg[/IMG]
[IMG]http://img246.imageshack.us/img246/7104/imgp7416.jpg[/IMG]
[IMG]http://img28.imageshack.us/img28/1470/imgp7595.jpg[/IMG]
[IMG]http://img203.imageshack.us/img203/3996/imgp7586.jpg[/IMG]
[IMG]http://img718.imageshack.us/img718/6902/imgp7580.jpg[/IMG]
[IMG]http://img175.imageshack.us/img175/7121/imgp7531k.jpg[/IMG]
[IMG]http://img85.imageshack.us/img85/5323/imgp7490.jpg[/IMG]
[IMG]http://img246.imageshack.us/img246/7104/imgp7416.jpg[/IMG]
K-5; Siggy 10-20 f4, 30mm f1.4, 18-50mm f2.8, 70-200mm f2.8; Tammy 400mm f4, 500mm f8
Posted 19/02/2010 - 21:32
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Also - after using this lens outside today, I think I take back what I said about wanting more oomph. It's actually silly how big a zoom it is!
K-5; Siggy 10-20 f4, 30mm f1.4, 18-50mm f2.8, 70-200mm f2.8; Tammy 400mm f4, 500mm f8
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567 posts
16 years
This is what sold me on the lens: http://www.bobatkins.com/photography/tutorials/mirror.html