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01/26/2004 10:53:51 PM · #1 |
Alright, I've searched for many hours. I have come to the conclusion that I don't know what to search for, so I turn to you peoples. I remember reading a thread about converting Xmm to Xzoom (like consumer model cameras) but I can't seem to find it again. I know I'm a real n00b to all these photography terms, but I'm trying to learn. Really! I am. :) So if anyone out there could enlighten me that would be great. Thanks!
Alex |
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01/26/2004 11:09:01 PM · #2 |
Have you tried
Community>Forums
Type in "Zoom" on the search |
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01/27/2004 12:22:28 AM · #3 |
| Yes I have, and a combination of other things. |
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01/27/2004 12:26:51 AM · #4 |
Zoom factor is the base focal length 'x' times. In a film camera, if your base focal length is 35mm, 10x would be 350mm. It's hard to gauge it on a film slr camera tho because the base length changes each time u change a lens. A 70-300mm lens is about 4.3x, but if you compare it to a 35mm lens, it is about 8.5x.
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01/27/2004 12:34:55 AM · #5 |
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01/27/2004 01:36:04 AM · #6 |
Originally posted by jmsetzler:
Zoom factor is the base focal length 'x' times. In a film camera, if your base focal length is 35mm, 10x would be 350mm. It's hard to gauge it on a film slr camera tho because the base length changes each time u change a lens. A 70-300mm lens is about 4.3x, but if you compare it to a 35mm lens, it is about 8.5x. |
I always thought that 50mm was 1x on a 35mm camera? |
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01/27/2004 01:41:54 AM · #7 |
| It occurs to me that photography may be the only field in which "ordinary" Americans (USA-ans) use metric units without gagging. (Although we then insist on printing our 35mm photos to 4x6 inch prints.) |
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01/27/2004 02:19:41 AM · #8 |
The conversion of X mm of a digital camera to X mm of a 35 mm format depends on the size of the sensor, e.g. for my Sony camera the digital range is 9.7 to 48 mm, which is equivalent to 38 to 190 mm when converted to 35 mm standards.
This is then a 5 x zoom factor since 190/38 = 5.
One could have a 5 x zoom factor and still have a different lens, for example 28 to 140.
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01/27/2004 02:22:17 AM · #9 |
| So 135 mm Lens on Rebel would be about 6X zoom,cool! |
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01/27/2004 02:28:22 AM · #10 |
Originally posted by pitsaman:
So 135 mm Lens on Rebel would be about 6X zoom,cool! |
Only if it is a 22.5 to 135 mm zoomlens.
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01/27/2004 02:31:16 AM · #11 |
Originally posted by willem:
Originally posted by pitsaman:
So 135 mm Lens on Rebel would be about 6X zoom,cool! |
Only if it is a 22.5 to 135 mm zoomlens. |
Of course, 22 X 1.6 = 35 mm or 1X |
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01/27/2004 04:54:58 AM · #12 |
Originally posted by pitsaman:
Originally posted by willem:
Originally posted by pitsaman:
So 135 mm Lens on Rebel would be about 6X zoom,cool! |
Only if it is a 22.5 to 135 mm zoomlens. |
Of course, 22 X 1.6 = 35 mm or 1X |
Not sure how to react. Are you just making fun of it ? Are you deliberately misinterpreting ? Or do you not understand ?
Or is it me who does not understand ?
Anyway, trying to react seriously, so as not to confuse the original poster of the request : a 135 mm lens on a Rebel gives the same field of view as a 1.6x135 mm = 215 mm on a 35 mm camera.
(some call this 1.6 the focal length multiplier, others call this field of view crop)
If it is a 135 mm prime lens, not a zoomlens, then you have no zoomfactor.
If it would be for example a 28-135 mm zoomlens, then this equates to a 45 to 215 mm equivalent on a 35 mm camera (which by the way looks like a nice addition to the standard kit lens ).
A 28-135 zoomlens has a zoomfactor of 135/28=4.8 (with the meaning of zoomfactor as it is used in advertising digital camera's)
Now I'll stop reacting further .....
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01/27/2004 01:28:15 PM · #13 |
| Thank You, very helpful. I also ran to a local camera shop and bombarded them with questions. I've learned a lot today, and not to mention I got to play with the Rebel. Soon enough, it will be mine... I am excited. |
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