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PostPosted: Sun Jun 27, 2010 7:39 am 
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Joined: Mon Jan 18, 2010 3:52 pm
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Location: The Netherlands
Hi,
I just found several wide angle lenses that you cna screw at the end of your lens. They called them 0,45 x wide angle.
What does that mean? The focal lenght X 0,45?
IF that's true, you can make from your old EF 28mm (what's on a crop factor less wide of course) a 28x0,45x1,6 lens?

Here a link btw: http://www.focalprice.com/DI532B/Digita ... Black.html

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Ruben

Panasonic DMC-FZ18, Panasonic DMC-FZ28, Canon G5, Canon 350D, Canon 50D + BG-E2N
Tamron 17-50 2.8, Canon EF 70-200mm f/4L USM,
Canon 18-55 II plus lots of Minolta MD/M42 lenses and bodies


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PostPosted: Sun Jun 27, 2010 9:23 am 
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Joined: Mon Dec 28, 2009 10:21 pm
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I wouldnt touch one of these.

It looks like as you say, you add it to a regular wide angle lens to make it an ultra wide angle, with a focal length of 0.45 multiplied by the actual focal length.

Id hate to see what it would do to the image quality.

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Nikon D5000 and D300 with 12-24mm, 35mm f1.8, 50mm f1.4, 60mm f2.8 Macro, 18-200mm, 17-55mm f2.8 (all Nikon)


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PostPosted: Sun Jun 27, 2010 9:54 am 
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Joined: Sun Feb 15, 2009 12:59 pm
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Location: The Netherlands
Whilst I have no experience with them, you can be sure to get poor performance (sharpness, flare, contrast), and probably a vignetted image.

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I take pictures so quickly, my highschool was "Continuous High".


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PostPosted: Sun Jun 27, 2010 9:59 am 
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I love some of the sales jargon they throw at you. Such as:

Macro
Infrared compatible
Optimized for mega pixel photography
High definition

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Nikon D5000 and D300 with 12-24mm, 35mm f1.8, 50mm f1.4, 60mm f2.8 Macro, 18-200mm, 17-55mm f2.8 (all Nikon)


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PostPosted: Sun Jun 27, 2010 9:59 am 
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Joined: Sun May 25, 2008 12:48 pm
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Location: UK
I got a similar one for smaller form factor. It was... interesting. Build quality was a nice surprise, with aluminium body and anti-reflection coated optics. Image sharpness was ok, yes it did get wider, but the image itself was reduced quite a bit. I guess I should give it a more detailed test and report back as an indication.

Oh, the macro part is the lens allows closer focus than without.

Edit: Now I remember why I didn't use it... the one I got only fits one of my lenses, and the AF motor isn't strong enough to turn the lens with the additional lens on the front.

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Canon DSLRs: 7D, 5D2, 1D, 600D, 450D full spectrum, 300D IR mod
Lenses: EF 35/2, 50/1.8, 85/1.8, 135/2+SF, 28-80 V, 70-300L, 100-400L, TS-E 24/3.5L, MP-E 65, EF-S 15-85 IS
3rd party: Zeiss 2/50 makro, Samyang 8mm fisheye, Sigma 150 macro, 120-300 f/2.8 OS, Celestron 1325/13
Tinies: Sony HX9V.


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PostPosted: Sun Jun 27, 2010 10:24 am 
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Joined: Mon Jan 18, 2010 3:52 pm
Posts: 2173
Location: The Netherlands
Thanks, I know it shouldnt have the best quality, and I had to laugh when I read about the High Definition :)
I asked myself this because I want to use my old lenses with an adapter on a new DSLR, but, 28mm was wide on a 35mm camera, but now it isnt.
IF the quality isnt there, itll be a throw of money I could have invested in a better lens.

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Ruben

Panasonic DMC-FZ18, Panasonic DMC-FZ28, Canon G5, Canon 350D, Canon 50D + BG-E2N
Tamron 17-50 2.8, Canon EF 70-200mm f/4L USM,
Canon 18-55 II plus lots of Minolta MD/M42 lenses and bodies


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PostPosted: Sun Jun 27, 2010 1:57 pm 
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Joined: Sun Aug 30, 2009 10:39 am
Posts: 136
Using a similar product for my camcorder and it works a treat for those times when you can't fit everything you'd want in the picture. It has a bit too much fish-eye effect for my liking to be able to leave it on for everything though. But I don't think it'd be great to use with a still camera.
This company makes some rather high quality wide-angle lenses though http://www.raynox.com/

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Canon 500D, 18-55mm IS, 55-200mm IS, Nissin Di622


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PostPosted: Sun Jun 27, 2010 3:11 pm 
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Location: The Netherlands
Raynox is supposed to be pretty decent from what I've heard. Als keep in mind that these things screw on, so it's not one size fits all!

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I take pictures so quickly, my highschool was "Continuous High".


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PostPosted: Sun Jun 27, 2010 4:45 pm 
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Joined: Sun Aug 30, 2009 10:39 am
Posts: 136
Indeed, the good thing with Raynox is that they supply adapter rings.
Sadly the one I have is not a Raynox...

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Canon 500D, 18-55mm IS, 55-200mm IS, Nissin Di622


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