work4bmi
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Mirror Lens Or Convertor?

Sat Mar 29, 2003 9:16 am

Owning a Canon D30, the ability to add new lenses is always good. Im after some extra "telescopic" for some close up photos. Just a couple of questions though, which if you could answer would be great?

(1) I have seen on eBay for example, Canon EOS lenses called "Mirror Lens"... They state you can have a 600mm focal length. This is obviously great for close up photos. Is this in effect, a "normal" lens that has a higher telephoto?

(2) Is it possible to use a convertor along with a 100-300 lens for example, with my Canon D30?

(3) If you know the answers to the above, which would you say is the best choice to consider?!

Thanks,

Aaron
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ckw
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RE: ««« Mirror Lens Or Convertor? »»»

Sat Mar 29, 2003 9:27 am

Having owned a Sigma 600 mirror and all manner of convertors, I would suggest that in terms of image quality a top end convertor on a prime lens beats the mirror every time. Good convertor on a zoom - less clear cut - lets
call it even. Budget convertor on any lens - the mirror is the better bet.

But, in my experience, the mirror is a pig to use - depth of field is minimal, requiring absolutely precise focusing ... but on the D30, forget AF and you'll be working with a dark viewfinder.

Cheers,

Colin
Colin K. Work, Pixstel
 
work4bmi
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RE: ««« Mirror Lens Or Convertor? »»»

Sat Mar 29, 2003 11:00 am

Would you say forget about the Mirror then, as I do own a D30?
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jwenting
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RE: ««« Mirror Lens Or Convertor? »»»

Sat Mar 29, 2003 5:43 pm

Forget the mirror.
Get a 300 f/2.8 and a 2x converter from the same brand.
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Glenn
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RE: ««« Mirror Lens Or Convertor? »»»

Sat Mar 29, 2003 7:28 pm

Absolutely no way ever buy a mirror lense

 
jwenting
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RE: ««« Mirror Lens Or Convertor? »»»

Sat Mar 29, 2003 10:31 pm

Unless you need something that's small and lightweight and those considerations are so important that you can live with poor optics and very limited functionality (fixed aperture, sometimes no focussing).
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ckw
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RE: ««« Mirror Lens Or Convertor? »»»

Sat Mar 29, 2003 10:35 pm

But a mirror will produce better results than a cheapo convertor.

Cheers.

Colin
Colin K. Work, Pixstel
 
PRM
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RE: ««« Mirror Lens Or Convertor? »»»

Sun Mar 30, 2003 5:03 am

I've used a 500mm mirror on a Minolta Slr, and they are limited, but would say you can get some ok results out of them. Problem is they are fixed aperture (normally f8 so you need go light for moving subjects) and they produce a bright circular halo in the centre of the resulting image, getting darker towards the edges.

I've shot a few here on ANet using this combination (consumer grade print film), and you can judge the results and difficiencies for yourself. If you have the extra money, go for a fixed prime + convertor.


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Cheers
Paul
 
Glenn
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RE: ««« Mirror Lens Or Convertor? »»»

Sun Mar 30, 2003 5:20 am

Colin never ever ever buy a cheap teleconverter  Smile/happy/getting dizzy
 
work4bmi
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RE: ««« Mirror Lens Or Convertor? »»»

Sun Mar 30, 2003 6:22 am

Great comments guys. My only concern is that the D30 does not accept convertors? Is this true?  Confused

Thanks,

Aaron
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ckw
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RE: ««« Mirror Lens Or Convertor? »»»

Sun Mar 30, 2003 6:34 am

D30 does accept convertors - are you sure you're thinking of what we're talking about - ie. a lens module that fits between your lens and the camera - NOT the screw in type that goes on the front of the lens.

What you might have heard is that the D30 won't AF with a convertor. This is true if the combined aperture of lens & convertor is numerically greater than f5.6 - eg. f8. Unfortunately with your 100-300 this will be the case. The camera WILL function perfectly, but you will have to manual focus.

Glenn - I've bought many cheap convertors in the past, that's why I know they're crap!

Cheers,

Colin

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hisham
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RE: 50mm Lens Questions

Sun Mar 30, 2003 6:54 am

The 100-300 is not compatible with canon converters. You need a third-party one which may not be as good.

Hisham.
 
work4bmi
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RE: Mirror Lens Or Convertor?

Sun Mar 30, 2003 11:04 am

So, the convertor does work with a D30 but only in MANUAL focus with a 100-300?

If this is the case, am still up for buying one. I would much appreciate any sites etc... where I can buy one, or at least compare the prices?

What would you say is a good price? I dont want to buy something that maybe to the "novice" is be a rip off?!

Thanks,

Aaron
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jwenting
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RE: Mirror Lens Or Convertor?

Sun Mar 30, 2003 3:51 pm

http://www.technikdirekt.de is an excellent online store located in Germany.
Good choice, good prices, excellent service.
Look for the more expensive Kenko models, they're supposed to be (I don't have one, but people that do recommend them which is good enough for me) very good.

I've done business with them several times, very professional and fast response. If items are in stock, they're usually shipped within a few days.
They know English, though the site is sometimes a mix of English and German (especially item names).

[Edited 2003-03-30 07:53:11]
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