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CameraRick
Joined: 21 Apr 2010 Posts: 77 Location: Berlin - Germany
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Posted: Sat May 15, 2010 7:51 pm Post subject: M42 Teleconverter - any good? |
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CameraRick wrote:
Hi there,
I'm searching for some good Tele (light tele, 70-100, something like that) Primes. But, they're pretty expensive - so I thought of buying a 2x Teleconverter for my M42 lenses; so I get 56, 70, 100 and 116 (my Helios 44-2 will come in just a few days ) in one shot.
So, are they any good? Do I have some problems like CA, or do I loose some stops?
I couldn't find anything with the search
Regards,
Lucas _________________ Canon EOS 550D|T2i
custom build pc DualXeon|24GB|7TB - MacBook white C2D|4GB|320GB |
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peterqd
Joined: 28 Feb 2007 Posts: 7448 Location: near High Wycombe, UK
Expire: 2014-01-04
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Posted: Sat May 15, 2010 8:03 pm Post subject: Re: M42 Teleconverter - any good? |
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peterqd wrote:
CameraRick wrote: |
I couldn't find anything with the search |
Hi Lucas, that's strange, we had a long discussion about this only 2 months ago:
http://forum.mflenses.com/tele-converters-t26095.html _________________ Peter - Moderator |
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dsmlogger
Joined: 14 Apr 2010 Posts: 178 Location: Athens, Greece
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Posted: Sat May 15, 2010 8:57 pm Post subject: |
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dsmlogger wrote:
I have a M42 HOYA 2x and an OM AICO 2x.
None of which gave me good results.
Nice to play with and brag about the effective focal lenghts of your tele-lenses but nothing special really.
The impact on resolution and the 2 full stops you lose made me to stop using them. |
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CameraRick
Joined: 21 Apr 2010 Posts: 77 Location: Berlin - Germany
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Posted: Sun May 16, 2010 1:51 am Post subject: |
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CameraRick wrote:
Maybe I'm just to stupid yet to search the right way
Thanks folks, I think then I'll spend some time in searching. For filming, I like to have the classic Prime-series (28, 35, 50, 85), even though I have an APS-C camera. High-tele isn't that interresting, you already have a high DoF. When the 135mm Pentacon is as nice as I hope (cheap thing on ebay he found in his basement (labeled it as "pentagon", I hope it has no fungus and stuff), I have something for high-tele, but not between 58 and 135 Zooms aren't that interesting, and 85mm are pretty expensive... I'll go on a flea market by tomorrow, wish me luck
Regards,
Lucas _________________ Canon EOS 550D|T2i
custom build pc DualXeon|24GB|7TB - MacBook white C2D|4GB|320GB |
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Anu
Joined: 14 Apr 2009 Posts: 879
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Posted: Sun May 16, 2010 12:09 pm Post subject: Re: M42 Teleconverter - any good? |
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Anu wrote:
CameraRick wrote: |
Hi there,
I'm searching for some good Tele (light tele, 70-100, something like that) Primes. But, they're pretty expensive - so I thought of buying a 2x Teleconverter for my M42 lenses; so I get 56, 70, 100 and 116 (my Helios 44-2 will come in just a few days ) in one shot.
So, are they any good? Do I have some problems like CA, or do I loose some stops?
I couldn't find anything with the search
Regards,
Lucas |
Since you're using a crop camera, I recommend Soviet made KOHBEPTEK 2x converter K-1. Also the east german converters can be good. Both these can be good without having to stop down.
The thing to remember is that if you put a TC into a crappy or average lens, you won't get good results - effectively a TC is only a magnifier which crops part of the image away and magifies the center to fill the frame. This means that you need to have a rock solid lens with which to use the TC.
Regarding losing stops: as you increase the focal length while the entrance pupil remains the same, you will lose stops. One stop for 1.4x TC, two stops for a 2x TC. http://en.wikipedia.org/wiki/F-number |
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martinsmith99
Joined: 31 Aug 2008 Posts: 6950 Location: S Glos, UK
Expire: 2013-11-18
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Posted: Thu May 20, 2010 4:27 pm Post subject: |
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martinsmith99 wrote:
I have a Vivitar 3x converter which I would recommend everyone should..........avoid! _________________ Casual attendance these days |
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PBFACTS
Joined: 24 Dec 2008 Posts: 568
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Posted: Fri May 21, 2010 8:49 am Post subject: Re: M42 Teleconverter - any good? |
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PBFACTS wrote:
CameraRick wrote: |
I thought of buying a 2x Teleconverter for my M42 lenses; so I get 56, 70, 100 and 116 (my Helios 44-2 will come in just a few days ) in one shot.
So, are they any good? Do I have some problems like CA, or do I loose some stops? |
All 1985/1990 7x elements converters (Tokina, Soligor, Foca, Kiron, Komura...) were good/very good
In fact, the quality is very close from the last generation converters
the only better converters are the last generations from prime manufacturers (canon, nikon, olympus...) _________________ OM USER .. I KEEP/USE:
Om2 sp + T32 (grip/filter/zoom) + T8
+ Zuiko 16mm 3.5 / 55mm 1.2 / 65-200 4/ x1.4
+ Sigma 8mm 4.0 / 14mm 3.5 / 18-35 3.5-4.5
+ Tamron 35/105 2.8
+Tokina 150/500 5.6
+ Kiron 105/2.8 macro 1:1
+ Vivitar S1 90/180 falst field macro
+ 2x Doubler HR7
>>I SELL: OM10 + OM4ti
+ i sell: OM Md1 + Md 2 + Grip PowerPack + charger
+ i sell: OM Zuiko 24mm 2.8 / 28mm 3.5 / 50mm 1.8 / 50mm 1.4 / 50mm 3.5 macro / 35-70 3.6 / 35-105 3.5-4.5 / 75-150 4 / 500mm / 2xA
+ i sell: OM Kiron 28/105 3.2-4.5 / 1.5 converter
+ i sell: OM Makinon reflex 5.6/300 + Spector reflex (makinon) 500mm
+ i sell: OM Macro panagor extender 1:1
+ i sell: OM Sigma 16mm 2.8 fisheye (last version) / 21-35 3.5-4.2 ot/ 28-70 2.8 /1000mm mirror
+ i sell: Tamron 28-70 3.5-4.5 / 28-80 sp 3.5-4.2 / 28-135 sp 4-4.5 / /28-200 3.5 / 35-135 3..5-4.5 / 90mm sp macro 1:1 2.8
+ i sell: OM Soligor 2x doubler / x3 converte
+ i sell: Soligor FisheEye x0.15
+ i sell: OM Tokina 28/135 4-4.6 / 70/210 3.5 (= vivitar S1 v2)
+ i sell: OM Vivitar 28-70 3.5-4.8 / 28-90 s1 2.8-3.5 / 35-70 2.8-3.8 / 55/2.8 Macro 1:1 (komine) / 70-150 3.8 ot (kiron) / 75-150 ot 3.8 (tokina + 2x matched)
+ i sell : OM cosina 100-500 5.6/8 |
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