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Forum: Troubleshooting and Beginner Help
03-27-2010, 06:30 AM
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Ok thanks, makes perfect sense.
All the best,
Phil
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Forum: Troubleshooting and Beginner Help
03-26-2010, 03:59 PM
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Marc, it looks like you were right, close focus gives magnified result with the old Takumar lens, however at infinite focus pictures shows same angle of view with both lenses...
Why is that?
Thanks
Phil
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Forum: Troubleshooting and Beginner Help
03-26-2010, 03:55 PM
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Now Infinite focus :
1 TAKUMAR 70-200 @200
2 TAMRON 18-250 @200
3 TAMRON 18-250@250
4 TAKUMAR 70-200 @200
5 TAMRON 18-250 @250
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Forum: Troubleshooting and Beginner Help
03-26-2010, 03:39 PM
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Another exemple at close focus
1st : Takumar old lens at 200mm
2nd : Tamron 18-250 @ 200mm
3rd: Tamron 18-250 @ 250mm
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Forum: Troubleshooting and Beginner Help
03-26-2010, 03:36 PM
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Here's som pictures at close focus
1st : Takumar old lens at 200mm
2nd : Tamron 18-250 @ 200mm
3rd : Tamron 18-250 @ 250mm
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Forum: Troubleshooting and Beginner Help
03-26-2010, 12:07 PM
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I'll post back with pictures soon
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Forum: Troubleshooting and Beginner Help
03-26-2010, 08:12 AM
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Sorry for my bad english. What i meant to say is the 35mm equivalent of a lens mounted on a DSLR camera, i.e a 200 mm is equivalent to 300 mm. At least from what i read in the reviews. I understand that is is due to a crop factor and that the lens remains a 200mm where ever it's mounted on!!!
But in my case, two different lenses set at 200mm, on the same body, gives me different results.
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Forum: Troubleshooting and Beginner Help
03-26-2010, 08:07 AM
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Yes i did tests at infinity and close focus with same results
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Forum: Troubleshooting and Beginner Help
03-26-2010, 08:03 AM
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I did various tests, some with close focus and some at infinity focus, same results.
Sorry for my bad english, what i meant is the 35mm equivalent focal length. Say a 100mm lens mounted on a DSLR has a 35mm equivalent of a 150mm. At least that is what i read in all reviews.
But in my case, two different lenses with the same focal gives me different results on the same body...
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Forum: Troubleshooting and Beginner Help
03-25-2010, 02:13 PM
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Hello, i've been using my Pentax K-M for a few months now and decided to purchase a Tamron superzoom (18-250) to replace the very good, but limited range, Pentax Kit lens (18-55) and my old Takumar (70-200) zoom.
Before selling the takumar, i decided to compare both lenses. I noticed with the new Tammon, when set to 250mm, covers a wider area than the old Takumar, at 200mm, in other words, the Takumar zooms "further" than the Tamron eventhough the Takumar it's only 200mm. I would say that if the Tamron covers 6 degrees, the old Takumar covers approx 4 degree, at least 1.5x more zoom power, as if the takumar was actually 300 mm and not 200.
I know that regarding camera designs, a lens mounted on a digital camera is about 1.5x more thant on a film camera. But... Different zooms on the same body should be the same?
A bit confused... So is my Takumar a 300mm or the Tamron not really a 250mm?
Thanks
Phil
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