| View previous topic :: View next topic |
| Author |
Message |
CameraRick
Joined: 21 Apr 2010
Posts: 77
Location: Berlin - Germany
|
 Posted: Sat May 15, 2010 7:51 pm Post subject: M42 Teleconverter - any good? |
 |
|
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 |
|
| Back to top |
|
 |
peterqd
Joined: 28 Feb 2007
Posts: 7448
Location: near High Wycombe, UK
Expire: 2014-01-04
|
| Posted: Sat May 15, 2010 8:03 pm Post subject: Re: M42 Teleconverter - any good? |
|
|
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 |
|
| Back to top |
|
|
dsmlogger
Joined: 14 Apr 2010
Posts: 178
Location: Athens, Greece
|
| Posted: Sat May 15, 2010 8:57 pm Post subject: |
|
|
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. |
|
| Back to top |
|
|
CameraRick
Joined: 21 Apr 2010
Posts: 77
Location: Berlin - Germany
|
| Posted: Sun May 16, 2010 1:51 am Post subject: |
|
|
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 |
|
| Back to top |
|
|
Anu
Joined: 14 Apr 2009
Posts: 879
|
| Posted: Sun May 16, 2010 12:09 pm Post subject: Re: M42 Teleconverter - any good? |
|
|
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 |
|
| Back to top |
|
|
martinsmith99
Joined: 31 Aug 2008
Posts: 6943
Location: S Glos, UK
Expire: 2013-11-18
|
| Posted: Thu May 20, 2010 4:27 pm Post subject: |
|
|
martinsmith99 wrote:
I have a Vivitar 3x converter which I would recommend everyone should..........avoid!
_________________
Casual attendance these days |
|
| Back to top |
|
|
PBFACTS
Joined: 24 Dec 2008
Posts: 564
|
| Posted: Fri May 21, 2010 8:49 am Post subject: Re: M42 Teleconverter - any good? |
|
|
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 |
|
| Back to top |
|
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
|
Search
Memberlist
Register
Profile
Log in to check your private messages
Log in
