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Old Jan 9, 2003, 5:03 PM   #1
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Default Wide angle means what in 35mm terms

I was looking at an add on wide angle for Dimage 7i.

The spec is 0.5.

Uh, what does that mean? It's not a fisheye. But how far down does it go? Is it equivalent to a 20? 24? 18?

Any advice, please.
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Old Jan 9, 2003, 5:35 PM   #2
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Default RE: Wideangle

0.5 generally is a multiplier of your lense's focal length. So if the base lens is 35mm (in 35mm camera equivalent), putting a 0.5 on would give you a 17.5mm lense.

Most add-on lenses only work over a portion of the cameras zoom range, so don't expect it to be usable at the long end of the zoom range unless the manufacturer claims it can be used over the entire range. Even then, the claim may only apply to the "normal" zoom range (3x).
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Old Jan 9, 2003, 6:08 PM   #3
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Ok. That's helpful. So now...what would you anticipate if it were (as it is) the Minolta Dimage 7i, with 28-210?

There is no mfg info listed
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Old Jan 9, 2003, 7:58 PM   #4
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FYI
http://www.stevesforums.com/phpBB2/v...nt+attachement


Also (if they are available?)
http://www.raynox.co.jp/english/digital/egdimage7hi.htm
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Old Jan 9, 2003, 9:37 PM   #5
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The Raynox problem is that their only wide seems to be a fish eye, which I don't really like to shoot with...
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Old Jan 10, 2003, 12:41 AM   #6
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Bonne année monsieurms and NHL!
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Old Jan 10, 2003, 7:27 AM   #7
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Thanks, and to y'all too.
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Old Jan 10, 2003, 9:10 AM   #8
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>getting close to a 110 degree field <

Do you have any idea what this would equate to in 35 mm coverage?
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Old Jan 10, 2003, 12:16 PM   #9
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Thought I had it all--it was great--until I got to that last sentence.

>It also shows that a .5 magnification equals a 22mm lens.
<

Now I'm confused again, which is undoubtedly nothing new.


If a 0.5 is on a 28--that should make it roughly a 14, which roughly equates to your 110 degrees. BUT you're saying that an 0.5 is a 22mm. So, I'm wondering what that means in light of the prior calculations and estimates.
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Old Jan 14, 2003, 9:02 PM   #10
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Well, I bought and tried it....a 0.48 Titanium with a 52-49 step down ring.

Frankly, the vignetting was SO bad, the lens if virtually useless. Going down below 52mm or so caused vignetting. At 52mm, that only takes me down to about 25mm, maybe 26---which isn't worth the effort when I can get to 28 mm with the normal fixed Dimage 7 lens, without changing, without step down rings. I think I'm going to take it back.

Oh, well, I guess. Does anyone know if the fisheyes vingette as badly?
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