Staffan
Topic Author
Posts: 3879
Joined: Tue Mar 18, 2008 9:21 am

Teleconverter

Sat Oct 20, 2001 1:40 am

I'm looking at getting a 2x teleconverter, can someone show some examples of what has been taken with one of theese?

Also, will the converter fit Both a Minolta Maxxum 7000, and a Dynax 5, or are there differences?

Thanks,

Staffan
 
mirage
Posts: 3612
Joined: Mon May 31, 1999 4:44 am

RE: Teleconverter

Sat Oct 20, 2001 4:00 am

ok you asked for examples, here are some using a Soligor 2x on a Sigma 100-300 on a Minolta 500Si, the most crapy use of three different systems/brands. Please note that this pics were all on excelent clear sunny days using manual focus. I don't suggest you a cheap teleconverter, you'll be very tired of it very quick.

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Photo © Luis Rosa



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Photo © Luis Rosa



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Photo © Luis Rosa



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Photo © Luis Rosa



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Photo © Luis Rosa



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Photo © Luis Rosa



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Photo © Luis Rosa



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Photo © Luis Rosa



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Photo © Luis Rosa



Luis
 
Staffan
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RE: Teleconverter

Sat Oct 20, 2001 4:51 am

Thanks alot!! The price I was told for the minolta converter was about 220$. A bit much, so I'm trying to get one second hand.

Staffan
 
mirage
Posts: 3612
Joined: Mon May 31, 1999 4:44 am

RE: Teleconverter

Sat Oct 20, 2001 5:01 am

My Soligor was around US$135, but a really frustating equipment, I can't use Auto focus and I can't shoot on cloudy days. I'll try to buy a Canon 2x sometime in the future.

Luis
 
da Fwog
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Joined: Thu Aug 19, 1999 5:25 am

RE: Teleconverter

Sat Oct 20, 2001 6:50 am

Luis,

it doesn't matter how EXPENSIVE the teleconverter - almost all cameras need a wide open aperture of F5.6 or greater to autofocus. A 2x converter reduces your max. aperture by 2 stops, so to autofocus using a 2x converter means your original lens needs to be F2.8 or better.



 
Staffan
Topic Author
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RE: Teleconverter

Sat Oct 20, 2001 7:23 am

Chris,

I've got a 75-300/4.5-5.6, should I just forget about a converter? I really don't want to spend money if I can't get good quality.

Regards,

Staffan
 
da Fwog
Posts: 845
Joined: Thu Aug 19, 1999 5:25 am

RE: Teleconverter

Sat Oct 20, 2001 7:30 am

Well, bear in mind that the loss of two stops is going to turn your lens into a 150-600mm F9-F11. So, quality aside, how practical would you find a 600mm F11?
 
Staffan
Topic Author
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Joined: Tue Mar 18, 2008 9:21 am

RE: Teleconverter

Sat Oct 20, 2001 7:43 am

I'll just rob a bank and buy a 600/f4 instead Big grin

Thanks, you're right, it might not be so wise after all...

Regards,

Staffan
 
ckw
Posts: 4586
Joined: Fri Aug 27, 2010 12:26 am

RE: Teleconverter

Sat Oct 20, 2001 7:56 am

Pros and cons - if you NEED the reach, you have to get a teleconvertor or have access to lots of cash for a long prime lens. I use a Canon 2x with a Canon 300 f4 and am very pleased with the results -


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Photo © Colin K. Work



The alternative is approx £8,000 for the Canon 600mm f4!

But Chris makes a very important point - many cameras will not autofocus with a teleconvertor attached - one of the reasons I chose the EOS 3 for my replacement system was the fact that it could still autofocus with an effective aperture of f8, but this facility is rare, and it must be said that autofocus is much slower with the convertor attached.

But that aside, image quality should not be a problem if you buy a top quality convertor. Experience with "bargain" convertors suggests these are a mistake.

Cheers,

Colin
Colin K. Work, Pixstel
 
Staffan
Topic Author
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RE: Teleconverter

Sat Oct 20, 2001 8:19 am

As my camera was bought in 1985, the autofocus is so slow that I can't even focus at a moving aircraft (perhaps if it's taxiing), I always shoot in MF. So not having the fucus available is no big problem, quality is however important to me. I was looking at a Minolta converter.

Regards,

Staffan
 
da Fwog
Posts: 845
Joined: Thu Aug 19, 1999 5:25 am

RE: Teleconverter

Sat Oct 20, 2001 9:05 am

Well, the quality issue depends on your optics overall. A teleconverter will only make a poor lens worse. Having said that, many professional photographers will shoot with a converter on an already long (and expensive) lens, in order to avoid an even MORE expensive (and ridiculous) lens.

I shoot with a Sigma 70-200 F2.8 + Sigma's matched "ex" 2x converter when I need it - the results are good, but the glass is significantly more costly than what you have (samples below). My only occasion to try an inexpensive teleconverter with a 70-300 F5.6 zoom, a few years ago, was disappointing, and I would not recommend it, unless you don't mind spending the money on experimenting. It might well work for you (after all, Luis has some fine shots), if you accept the likely limitations.


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Photo © Chris Sheldon



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Photo © Chris Sheldon



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Photo © Chris Sheldon



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Photo © Chris Sheldon

 
Staffan
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RE: Teleconverter

Sat Oct 20, 2001 9:43 am

Thanks, your photos are really great  Big thumbs up

I'll see if I can borrow one to start with to see if it will work out. The lense I use is apparently a rather good one. I bet the best thing is to us a minolta converter with a minolta lense, is that correct??

Regards,

Staffan

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