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martyn_bannister
Joined: 23 May 2010
Posts: 1151
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 Posted: Fri Oct 15, 2010 5:16 pm Post subject: Teleconverters. Is there an M42 TC that you would recommend? |
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martyn_bannister wrote:
Hi all.
OK, so everone slags off TC's. If you have a decent lens then there is no way to get a good photo with it once you put a TC in the way. But is this always true? Surely, manufacturers who can produce extremely good lenses ought also to be able to produce a good TC?
Or is it true? Is it that, by their very nature, TC's are a compromise and therefore they will always compromise the image quality?
Can anyone recommend a good model/make of TC to fit my M42 lenses?????? |
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Farside
Joined: 01 Sep 2007
Posts: 6557
Location: Ireland
Expire: 2013-12-27
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| Posted: Fri Oct 15, 2010 5:33 pm Post subject: |
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Farside wrote:
I picked up a Tamron SP M42 2x t/c a couple of years ago, not expecting anything special, but hoped it wouldn't be as crap as many of the no-name M42 ones.
It's ok, not stunning, but ok for what I occasionally need it for.
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martyn_bannister
Joined: 23 May 2010
Posts: 1151
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| Posted: Fri Oct 15, 2010 5:51 pm Post subject: |
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martyn_bannister wrote:
I have several and in daylight the Helios ones generally introduce the least CA and degradation in sharpness. I haven't tried a tamron one yet. |
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ManualFocus-G
Joined: 29 Dec 2008
Posts: 6622
Location: United Kingdom
Expire: 2014-11-24
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| Posted: Fri Oct 15, 2010 5:59 pm Post subject: |
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ManualFocus-G wrote:
I picked up a new Kenko Teleplus DGX Pro 1.4x teleconverter recently in Canon EF mount for just over £100.00. Works nicely with my EF lenses, and any lens+adapter combos I stick on top of it 
Bit pricey mind 
P.s. There's a 2x version around as well.
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Shooter of choice: Fujifilm X-T20 with M42, PB and C/Y lenses
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martyn_bannister
Joined: 23 May 2010
Posts: 1151
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| Posted: Fri Oct 15, 2010 6:09 pm Post subject: |
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martyn_bannister wrote:
| ManualFocus-G wrote: |
I picked up a new Kenko Teleplus DGX Pro 1.4x teleconverter recently in Canon EF mount for just over £100.00. Works nicely with my EF lenses, and any lens+adapter combos I stick on top of it
Bit pricey mind
P.s. There's a 2x version around as well. |
What, like this one? Is it a bargain? |
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ManualFocus-G
Joined: 29 Dec 2008
Posts: 6622
Location: United Kingdom
Expire: 2014-11-24
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| Posted: Fri Oct 15, 2010 6:17 pm Post subject: |
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ManualFocus-G wrote:
| martyn_bannister wrote: |
| ManualFocus-G wrote: |
I picked up a new Kenko Teleplus DGX Pro 1.4x teleconverter recently in Canon EF mount for just over £100.00. Works nicely with my EF lenses, and any lens+adapter combos I stick on top of it
Bit pricey mind
P.s. There's a 2x version around as well. |
What, like this one? Is it a bargain? |
No idea my friend, looks old!
This is the modern AF version:
http://www.onestop-digital.com/index.php?dispatch=products.view&product_id=33483
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Graham - Moderator
Shooter of choice: Fujifilm X-T20 with M42, PB and C/Y lenses
See my Flickr photos at http://www.flickr.com/photos/manualfocus-g |
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martinsmith99
Joined: 31 Aug 2008
Posts: 6950
Location: S Glos, UK
Expire: 2013-11-18
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| Posted: Fri Oct 15, 2010 7:30 pm Post subject: |
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martinsmith99 wrote:
| ManualFocus-G wrote: |
| Bit pricey mind |
Are you a closet Bristolian? 
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Casual attendance these days |
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ManualFocus-G
Joined: 29 Dec 2008
Posts: 6622
Location: United Kingdom
Expire: 2014-11-24
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| Posted: Fri Oct 15, 2010 8:08 pm Post subject: |
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ManualFocus-G wrote:
| martinsmith99 wrote: |
| ManualFocus-G wrote: |
| Bit pricey mind |
Are you a closet Bristolian? |
Darrgh I be not!
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Graham - Moderator
Shooter of choice: Fujifilm X-T20 with M42, PB and C/Y lenses
See my Flickr photos at http://www.flickr.com/photos/manualfocus-g |
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RioRico
Joined: 12 Mar 2010
Posts: 1120
Location: California or Guatemala or somewhere
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| Posted: Fri Oct 15, 2010 10:42 pm Post subject: |
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RioRico wrote:
I have accumulated a pile of M42 TC's over the last couple years and I never use them. Maybe because I have about 100 lenses to mount on my K20D, so I don't *need* TCs. These TC's mostly arrived with batches of other stuff.
I shall put most of them up on eBay in a few days. I will keep the Helios 2X and Hama 2X because they were too costly to be worth selling, and I'll keep the Mepro 3X because who knows? A 3x might be useful some day, far in the future...
But three Vivitar 2X's and a (Kalcor?) Vairmirax 2X and a Spiratone 3X, all of which cost me an average of US$3.50? Feh, I just don't need or want them. Or should I keep the Spiratone and sell the Mepro?
I can see just one possible use for all these: stack them! That would be 18x total! Stacked under my Rubinar Makpo 1000/10, it would become an 18000/180, the envy of every Peeping Tom, eh?
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Too many film+digi cams+lenses, oh my -- Pentax K20D, K-1000, M42s, more
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martyn_bannister
Joined: 23 May 2010
Posts: 1151
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| Posted: Sat Oct 16, 2010 8:01 am Post subject: |
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martyn_bannister wrote:
| RioRico wrote: |
I have accumulated a pile of M42 TC's over the last couple years and I never use them. Maybe because I have about 100 lenses to mount on my K20D, so I don't *need* TCs. These TC's mostly arrived with batches of other stuff.
I shall put most of them up on eBay in a few days. I will keep the Helios 2X and Hama 2X because they were too costly to be worth selling, and I'll keep the Mepro 3X because who knows? A 3x might be useful some day, far in the future...
But three Vivitar 2X's and a (Kalcor?) Vairmirax 2X and a Spiratone 3X, all of which cost me an average of US$3.50? Feh, I just don't need or want them. Or should I keep the Spiratone and sell the Mepro?
I can see just one possible use for all these: stack them! That would be 18x total! Stacked under my Rubinar Makpo 1000/10, it would become an 18000/180, the envy of every Peeping Tom, eh? |
Ah yes, think of the moon shot you could get with that! |
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martyn_bannister
Joined: 23 May 2010
Posts: 1151
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| Posted: Sat Oct 16, 2010 8:03 am Post subject: |
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martyn_bannister wrote:
| ManualFocus-G wrote: |
| martyn_bannister wrote: |
| ManualFocus-G wrote: |
I picked up a new Kenko Teleplus DGX Pro 1.4x teleconverter recently in Canon EF mount for just over £100.00. Works nicely with my EF lenses, and any lens+adapter combos I stick on top of it
Bit pricey mind
P.s. There's a 2x version around as well. |
What, like this one? Is it a bargain? |
No idea my friend, looks old!
This is the modern AF version:
http://www.onestop-digital.com/index.php?dispatch=products.view&product_id=33483 |
V. nice As the saying goes, you get what you pay for |
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Anu
Joined: 14 Apr 2009
Posts: 879
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| Posted: Sat Oct 16, 2010 9:58 am Post subject: |
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Anu wrote:
| RioRico wrote: |
I have accumulated a pile of M42 TC's over the last couple years and I never use them. Maybe because I have about 100 lenses to mount on my K20D, so I don't *need* TCs. These TC's mostly arrived with batches of other stuff.
I shall put most of them up on eBay in a few days. I will keep the Helios 2X and Hama 2X because they were too costly to be worth selling, and I'll keep the Mepro 3X because who knows? A 3x might be useful some day, far in the future...
But three Vivitar 2X's and a (Kalcor?) Vairmirax 2X and a Spiratone 3X, all of which cost me an average of US$3.50? Feh, I just don't need or want them. Or should I keep the Spiratone and sell the Mepro?
I can see just one possible use for all these: stack them! That would be 18x total! Stacked under my Rubinar Makpo 1000/10, it would become an 18000/180, the envy of every Peeping Tom, eh? |
My record so far is only 6.000mm (f/90 or something like that) - K20D'
s image stabilizer was good enough to give a "reasonable" image hand held at 1/90 - no motion blur I could see, but other than that the result was a bit soft |
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Anu
Joined: 14 Apr 2009
Posts: 879
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| Posted: Sat Oct 16, 2010 10:13 am Post subject: Re: Teleconverters. Is there an M42 TC that you would recomm |
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Anu wrote:
| martyn_bannister wrote: |
Hi all.
OK, so everone slags off TC's. If you have a decent lens then there is no way to get a good photo with it once you put a TC in the way. But is this always true? Surely, manufacturers who can produce extremely good lenses ought also to be able to produce a good TC?
Or is it true? Is it that, by their very nature, TC's are a compromise and therefore they will always compromise the image quality?
Can anyone recommend a good model/make of TC to fit my M42 lenses?????? |
With TCs you need a good lens to use it with. What a TC does is that it magnifies the image by a factor (of 2 for example). If the lens you use the TC with is not up to it, TC won't really do much or any good, and will itroduce it's own aberrations into the optical equation.
I have posted (and lost from my computer, dang) a good sample of how to compare an image created by TC-equipped lens and the same image created without the TC. In that example 2x TC on a CZJ 180/2.8 Sonnar (ie. 360/5.6) created far better image of a euro-bill than if I had used a 180-lens and then magnified it in post processing by the same factor. You can search for the sample image in the forums I am sure.
I have found two good TCs - KOHBEPTEP from Soviet Union, and the East German made ones. These are with only 4 elements. I've never had a 7-element m42-TC, but they are probably good too, though more expensive I am sure.
For best results you should stop down a stop (or two), so the viewfinder may be rather dark. The requirement depends on the TC and the distance your subject is (and the light too).
The most important thing is to have a rock solid prime lens to use the TCs with. Really, no point in trying them with crappomaticzoooms or even all-right-primes. I recommend the CZJ-teles for this use. Or just biting the bullet and getting a longer lens - I've hear only good things about for example the CZJ 1000/5.6  |
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martyn_bannister
Joined: 23 May 2010
Posts: 1151
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| Posted: Sat Oct 16, 2010 12:12 pm Post subject: Re: Teleconverters. Is there an M42 TC that you would recomm |
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martyn_bannister wrote:
| Anu wrote: |
The most important thing is to have a rock solid prime lens to use the TCs with. Really, no point in trying them with crappomaticzoooms or even all-right-primes. I recommend the CZJ-teles for this use. Or just biting the bullet and getting a longer lens - I've hear only good things about for example the CZJ 1000/5.6 |
The longest lenses I have are Russian mirrors and my copies aren't the sharpest. Perhaps I shall have to save up for a CZJ 1000/5.6 |
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Anu
Joined: 14 Apr 2009
Posts: 879
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| Posted: Sat Oct 16, 2010 12:36 pm Post subject: Re: Teleconverters. Is there an M42 TC that you would recomm |
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Anu wrote:
| martyn_bannister wrote: |
| Anu wrote: |
The most important thing is to have a rock solid prime lens to use the TCs with. Really, no point in trying them with crappomaticzoooms or even all-right-primes. I recommend the CZJ-teles for this use. Or just biting the bullet and getting a longer lens - I've hear only good things about for example the CZJ 1000/5.6 |
The longest lenses I have are Russian mirrors and my copies aren't the sharpest. Perhaps I shall have to save up for a CZJ 1000/5.6 |
I recommend against using TCs with those mirror lenses, though you might get tiny little bit more detail out of the images, but it is just not worth the trouble (and the extra aberrations of the TCs). Just save money for the CZJ lens |
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Excalibur
Joined: 19 Jul 2009
Posts: 5017
Location: UK
Expire: 2014-04-21
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| Posted: Sat Oct 16, 2010 1:15 pm Post subject: |
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Excalibur wrote:
***Really, no point in trying them with crappomaticzoooms or even all-right-primes.****
Well I've five extenders and have achieved some good results from zooms with extenders...in my experience it's mix and match as some zooms work better than others with different extenders.
e.g. the matching Vivitar extender that is made for a Vivitar 70-150mm, gives goods results with a Tamron 70-210 46a 
e.g.2 If I was a betting man, I'd wager that getting a Kiron match mate would work with most Kiron or Vivitar (22) lenses.
This is good enough for most people, Tamron 46a with vivitar 2X extender:-
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.........past gear Tele Rolleiflex and Rollei SL66.
Many lenses from good to excellent. |
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