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Abbazz
Joined: 23 Jun 2007 Posts: 1098 Location: Jakarta
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Posted: Sat Feb 16, 2008 10:10 am Post subject: Tamron Adaptall 300/2.8 with teleconverters - Pictures added |
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Abbazz wrote:
Today it has been pouring since the early morning, so I am stuck at home. Poilu's thread inspired me to experiment with teleconverters. As the day was so dull, I took my Tamron Adaptall II 300/2.8 SP and used it wide open. The following shots have not been sharpened at all. Sorry for the uninteresting subjects.
Here are two shots with the lens without any teleconverter:
100% crop of preceding picture:
100% crop of preceding picture:
Now, two shots with the Pentax 1.7x AF Adapter (turns the Tamron into an autofocus 510mm F/4.5 lens):
100% crop of preceding picture:
100% crop of preceding picture:
Now, two shots with the Vivitar 2x Macro Focusing Teleconverter (turns the Tamron into a macro 600mm F/5.6 lens):
100% crop of preceding picture:
100% crop of preceding picture:
Then, two shots with the Kenko 3x Teleplus Pro 300 (turns the Tamron into a big 900mm F/8 lens):
100% crop of preceding picture:
100% crop of preceding picture:
Of course the pictures with the 3x converter are fuzzy, but they have been taken handheld at 1/100sec., thanks to the image stabilization of the Pentax. And for web sized illustrations, the quality is not so bad.
Cheers!
Abbazz _________________ Il n'y a rien dans le monde qui n'ait son moment decisif, et le chef-d'oeuvre de la bonne conduite est de connaitre et de prendre ce moment. - Cardinal de Retz
The 6x9 Photography Online Resource:
http://artbig.com/
Last edited by Abbazz on Sun Feb 17, 2008 12:56 pm; edited 1 time in total |
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Orio
Joined: 24 Feb 2007 Posts: 29545 Location: West Emilia
Expire: 2012-12-04
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Posted: Sat Feb 16, 2008 11:15 am Post subject: |
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Orio wrote:
The first converter seems excellent, the second one so-and-so, the third one... hmm... _________________ Orio, Administrator
T*
NE CEDE MALIS AUDENTIOR ITO
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Abbazz
Joined: 23 Jun 2007 Posts: 1098 Location: Jakarta
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Posted: Sat Feb 16, 2008 11:37 am Post subject: |
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Abbazz wrote:
Orio wrote: |
The first converter seems excellent, the second one so-and-so, the third one... hmm... |
That's usual with teleconverters: the biger the magnification factor, the worse the result. But it's usually better to use a teleconverter than simply upsample an image to get the same magnification factor.
Cheers!
Abbazz _________________ Il n'y a rien dans le monde qui n'ait son moment decisif, et le chef-d'oeuvre de la bonne conduite est de connaitre et de prendre ce moment. - Cardinal de Retz
The 6x9 Photography Online Resource:
http://artbig.com/ |
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Richard_D
Joined: 21 Oct 2007 Posts: 2378 Location: Faversham Kent UK
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Posted: Sat Feb 16, 2008 11:48 am Post subject: |
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Richard_D wrote:
With a decent lens they Can be a worthwhile compromise. _________________ Richard
The interesting bit:
Nikkors: 20mm f2.8 AIS, 24mm f2.8 AIS, 28mm f2.8 AIS, 35mm f2 AIS, 50mm f1.4 AI, 50mm f1.48AI, 50m f2 AI,
55mm f3.5 AI'd, 105mm f4 AI, 135mm f2.8 AI'd, 135mm f3.5 AI'd, 200mm f4 AI'd .
Nikon E Series: 100mm f2.8 .
Soviet Nikon Mount: Zenitar 16mm f2.8, Arsat/arax/photex 85mm T&S f2.8 .
Other: Asahi Super Takumar 55 mm f2 (M42) ,Tamron 300mm f5.6 SP, Tamron 500mm f8 SP.
DSLR: Nikon D700. 35mm SLRsNikon FE, Pentax S1a.
TLR: Rolliecord II.
Sub-Minature: Pentax Auto 110, 18mm f2.8, 24mm f2.8, 50mm f2.8.
More to come... |
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poilu
Joined: 26 Aug 2007 Posts: 10472 Location: Greece
Expire: 2019-08-29
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Posted: Sat Feb 16, 2008 12:14 pm Post subject: |
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poilu wrote:
I like the concept Pentax 1.7x AF Adapter who transform manual lenses in AF
The result are very nice and it's evident the tamron 300 2.8 is a keeper.
Teleconverters are a helpful solution but have also disadvantages.
Today one other solution could be to have a bag with one 5D, one 400D and one oly to have choice between x1 x1.6 & x2 _________________ T* |
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Orio
Joined: 24 Feb 2007 Posts: 29545 Location: West Emilia
Expire: 2012-12-04
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Posted: Sat Feb 16, 2008 3:32 pm Post subject: |
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Orio wrote:
With MF lenses costing so little, I personally can not see the point in using teleconverters at all.
A Jupiter-37 costs only around 20 Euros sometimes less.
A x2 teleconverter probably costs more and when you add it to even the best of your 50mm or 85mm lenses, it will always give worse results than the Jupiter-37.
And this is valid for practically all focal lenghts I can think of.
And even the space taken in bag is about the same.
Only possible little advantage, to add a TC to a very long tele (like 200mm) to make it longer and leave home a big lens - but usually long teles are dark and adding a TC makes their use awkward.
So all in all... no, I'm not going to join the TC wave.
- _________________ Orio, Administrator
T*
NE CEDE MALIS AUDENTIOR ITO
Ferrania film is reborn! http://www.filmferrania.it/
Support the Ornano film chemicals company and help them survive!
http://forum.mflenses.com/ornano-chemical-products-t55525.html |
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Farside
Joined: 01 Sep 2007 Posts: 6557 Location: Ireland
Expire: 2013-12-27
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Posted: Sat Feb 16, 2008 3:42 pm Post subject: |
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Farside wrote:
I often carry one 'just in case'. It can be handily used getting a shot that would otherwise have been out of reach and if the lens and TC are good ones there's only a slight penalty to be paid in IQ. In my OM kit I had (still have) a Komura 95 2x TC which was perfectly ok if I wasn't looking for super enlargements but now I prefer to use the SP TC where possible.
It's all horses for courses. _________________ Dave - Moderator
Camera Fiend and Biograph Operator
If I wanted soot and whitewash I'd be a chimney sweep and house painter.
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poilu
Joined: 26 Aug 2007 Posts: 10472 Location: Greece
Expire: 2019-08-29
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Posted: Sat Feb 16, 2008 4:15 pm Post subject: |
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poilu wrote:
Abbazz wrote: |
Tamron Adaptall II 300/2.8 SP and used it wide open |
For wide open F2.8 it is very good lens _________________ T* |
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patrickh
Joined: 23 Aug 2007 Posts: 8551 Location: Oregon
Expire: 2011-11-18
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Posted: Sat Feb 16, 2008 5:16 pm Post subject: |
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patrickh wrote:
That Tamron seems a very fine lens. Extenders behaving as one would expect - increasing deterioration with additional magnification.
patrickh _________________ DSLR: Nikon D300 Nikon D200 Nex 5N
MF Zooms: Kiron 28-85/3.5, 28-105/3.2, 75-150/3.5, Nikkor 50-135/3.5 AIS // MF Primes: Nikkor 20/4 AI, 24/2 AI, 28/2 AI, 28/2.8 AIS, 28/3.5 AI, 35/1.4 AIS, 35/2 AIS, 35/2.8 PC, 45/2.8 P, 50/1.4 AIS, 50/1.8 AIS, 50/2 AI, 55/2.8 AIS micro, 55/3.5 AI micro, 85/2 AI, 100/2,8 E, 105/1,8 AIS, 105/2,5 AIS, 135/2 AIS, 135/2.8 AIS, 200/4 AI, 200/4 AIS micro, 300/4.5 AI, 300/4.5 AI ED, Arsat 50/1.4, Kiron 28/2, Vivitar 28/2.5, Panagor 135/2.8, Tamron 28/2.5, Tamron 90/2.5 macro, Vivitar 90/2.5 macro (Tokina) Voigtlander 90/3.5 Vivitar 105/2.5 macro (Kiron) Kaleinar 100/2.8 AI Tamron 135/2.5, Vivitar 135/2.8CF, 200/3.5, Tokina 400/5,6
M42: Vivitar 28/2.5, Tamron 28/2.5, Formula5 28/2.8, Mamiya 28/2.8, Pentacon 29/2.8, Flektogon 35/2.4, Flektogon 35/2.8, Takumar 35/3.5, Curtagon 35/4, Takumar 50/1.4, Volna-6 50/2.8 macro, Mamiya 50/1.4, CZJ Pancolar 50/1,8, Oreston 50/1.8, Takumar 50/2, Industar 50/3.5, Sears 55/1.4, Helios 58/2, Jupiter 85/2, Helios 85/1.5, Takumar 105/2.8, Steinheil macro 105/4.5, Tamron 135/2.5, Jupiter 135/4, CZ 135/4, Steinheil Culminar 135/4,5, Jupiter 135/3.5, Takumar 135/3.5, Tair 135/2.8, Pentacon 135/2.8, CZ 135/2.8, Taika 135/3.5, Takumar 150/4, Jupiter 200/4, Takumar 200/4
Exakta: Topcon 100/2.8(M42), 35/2.8, 58/1.8, 135/2.8, 135/2.8 (M42), Kyoei Acall 135/3.5
C/Y: Yashica 28/2.8, 50/1.7, 135/2.8, Zeiss Planar 50/1.4, Distagon 25/2.8
Hexanon: 28/3.5, 35/2.8, 40/1.8, 50/1.7, 52/1.8, 135/3.2, 135/3.5, 35-70/3.5, 200/3.5
P6 : Mir 38 65/3.5, Biometar 80/2.8, Kaleinar 150/2.8, Sonnar 180/2.8
Minolta SR: 28/2.8, 28/3.5, 35/2.8, 45/2, 50/2, 58/1.4, 50/1.7, 135/2.8, 200/3.5
RF: Industar 53/2.8, Jupiter 8 50/2
Enlarg: Rodagon 50/5,6, 80/5,6, 105/5.6, Vario 44-52/4, 150/5.6 180/5.6 El Nikkor 50/2,8,63/2.8,75/4, 80/5,6, 105/5.6, 135/5.6 Schneider 60/5.6, 80/5.6, 80/4S,100/5.6S,105/5.6,135/5.6, 135/5.6S, 150/5.6S, Leica 95/4 |
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Abbazz
Joined: 23 Jun 2007 Posts: 1098 Location: Jakarta
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Posted: Sun Feb 17, 2008 12:14 am Post subject: |
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Abbazz wrote:
Orio wrote: |
Only possible little advantage, to add a TC to a very long tele (like 200mm) to make it longer and leave home a big lens - but usually long teles are dark and adding a TC makes their use awkward. |
I agree 100% with you Orio. Until recently, I had never seen the point of using teleconverters. Then my 9 years old son literally fell in love with the moon and asked me to give him poster sized pictures of the moon. As I couldn't find any in the poorly stocked bookstores of Bandar Seri Begawan, I decided to give a try to shooting it myself. My longest lenses at the time were a 500/4.5 Takumar and a 200-500/5.6 Tamron Adaptall. The size of the moon on the image plane is roughly 1mm per 100mm of focal length, which means that the moon appears as a 5mm disc when pictured with a 500mm lens. Not enough for poster sized prints. Long telephoto lenses are rather expensive and I have no other use for them than portraiting the moon, so I was not willing to invest big money.
So I bought a Pentax 1.7x converter, as it has a good reputation and can be used to add autofocus to a manual lens -- yeah, I know this is Manual Focus Lenses Forum, but autofocus can be useful sometimes, especially with longer focal lengths (the Tamron Adaptall II 300/2.8 SP makes a real neat 510/4.5 autofocus lens). The results were not bad at all, and the moon was a bit bigger on the picture. So I bought a 2x and then a 3x teleconverter. With a good lens stopped down two stops, even the 3x can produce fine images. Of course, two stops down with an f/5.6 lens means I am shooting at f/11, or an effective aperture of f/32 with a 3x converter, which is definitely not usable. Except for the moon on a tripod. And with the 3x, the moon appears almost full frame on the pictures taken with my K10d.
I am just hoping for a clear full moon night... Needless to say, I have now found a nice poster of the moon for my son. It is much bigger than the maximum paper size handled by my printer and it has much better resolution than anything I could shoot with my amateur lenses. But it's a lot of fun shooting the moon.
I have also found another use for teleconverters, that's for close-up and macro photography. By increasing the magnification, teleconverters provide a bigger image of small objects. The optical defects are less visible on macro shots because of the magnification, so the quality is really good. A Helios 40 with a 2x converter is the ultimate close up lens for dreamy effects!
Cheers!
Abbazz _________________ Il n'y a rien dans le monde qui n'ait son moment decisif, et le chef-d'oeuvre de la bonne conduite est de connaitre et de prendre ce moment. - Cardinal de Retz
The 6x9 Photography Online Resource:
http://artbig.com/ |
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Abbazz
Joined: 23 Jun 2007 Posts: 1098 Location: Jakarta
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Posted: Sun Feb 17, 2008 10:20 am Post subject: |
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Abbazz wrote:
I was not very satisfied with the results I obtained yesterday with he converters. The pictures were much less sharp that my moon shots. I thought that the dull weather, combined with handheld shooting at low speed (1/100sec. for a 900mm lens) might have worsened the results. To be sure, I set up my camera on a sturdy Leitz tripod and took some pictures of a hibiscus flower about 10 meters away. I used the same Tamron Adaptall II 300/2.8 SP as for yesterday's photos. All pictures are shown here unsharpened.
First, the lens with a Pentax 2X-S Rear Converter. Wide open at F/2.8 (600mm/5.6 equ.):
100% crop of above picture:
At F/5.6 (600mm/11 equ.):
100% crop of above picture:
Then, I used the lens with a Kenko 3X Teleplus Pro 300 converter. Wide open at F/2.8 (900mm/8 equ.):
100% crop of above picture:
At F/5.6 (900mm/16 equ.):
100% crop of above picture:
The results are certainly much better than what I got yesterday. These new pictures confirm that to get nice pictures with a teleconverter, one has to use a good lens, a quality converter and a stable tripod. On a fast 300mm telephoto lens, an 1.4x or 1.7x converter is usable handheld, a 2x is usable handheld only if the light is good and a 3x is strictly tripod only.
Cheers!
Abbazz _________________ Il n'y a rien dans le monde qui n'ait son moment decisif, et le chef-d'oeuvre de la bonne conduite est de connaitre et de prendre ce moment. - Cardinal de Retz
The 6x9 Photography Online Resource:
http://artbig.com/ |
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poilu
Joined: 26 Aug 2007 Posts: 10472 Location: Greece
Expire: 2019-08-29
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Posted: Sun Feb 17, 2008 2:20 pm Post subject: |
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poilu wrote:
impressive results!
The hibiscus is a difficult subject to focus, the pentax and the 300mm do great job (and you also )
On web size, all 4 samples look great and only 100% crop show what's going on.
Nice test, it show it doesn't cost to much to keep a converter in a bag and it could be useful. _________________ T* |
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Abbazz
Joined: 23 Jun 2007 Posts: 1098 Location: Jakarta
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Posted: Mon Feb 18, 2008 2:01 am Post subject: |
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Abbazz wrote:
poilu wrote: |
impressive results!
The hibiscus is a difficult subject to focus, the pentax and the 300mm do great job (and you also ) |
Thanks Poilu.
poilu wrote: |
Nice test, it show it doesn't cost to much to keep a converter in a bag and it could be useful. |
I won't carry the 300/2.8 lens and the heavy tripod in my bag "just in case," but the Pentax 1.7x AF Adapter with the Voigländer 125/2.5 lens makes a great travel combo.
Cheers!
Abbazz _________________ Il n'y a rien dans le monde qui n'ait son moment decisif, et le chef-d'oeuvre de la bonne conduite est de connaitre et de prendre ce moment. - Cardinal de Retz
The 6x9 Photography Online Resource:
http://artbig.com/ |
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