Tag Archives: telephoto lens

Teleconverters and aperture factors – f stop.

300mm f4 lens with 1.4x converter produces f5.6. Excerpt from LensRentals.com The teleconverter reduces the maximum aperture of the lens by one stop (1.4x converter), 1.5 stops (1.7x converter) or 2 stops (2x converter). An f/4 lens becomes an f/5.6 lens … Continue reading

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Telephoto lens’ photos

I took a course in Keven Shwantz school at Road Atlanta circuit on July 2nd to July 3rd 2007 in Georgia, U.S. The tuition fee was over $1,700 USD excluding damage deposit up front. I doubt I would ever attend … Continue reading

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Nikon ED AF NIKKOR 300mm 1:4

(2/17/2013;) Teleconverters for this lens: Kenko Pro 300 1.4x, Kenko Pro 300 DG 1.4x Click to access Nikonians%20Teleconverter%20Table.pdf (old) I borrrowed this telephoto lens yesterday. I’ll check out the mount adapter for my Canon camera.

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