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I have a Pentax K10D and am considering one of the above lenses for a trip to Africa next year and also for wildlife work in the UK, while the 50-500 would probably be suitable for the bright conditions of Africa will it still work well in the greyer Britain? Or am I better off with a shorter f4 ??

2007-11-16 21:40:04 · 2 answers · asked by Speedo_SaltRock 2 in Arts & Humanities Visual Arts Photography

2 answers

IMO you'll be better of with the 100-300 with its constant f-4 aperture. Buy a good quality 2X (Sigma probably offers one for this lens) teleconverter for use in Africa. Just remember that it not only doubles the focal length (your 100-300 becomes a 200-600) it also doubles the f-stop so your f4 lens performs like it would at f8. A good tripod should be included in your kit. Having a monopod would also be a good idea for those times when the tripod isn't practical to use.

You should also have a UV filter mounted on every lens you plan to take. You'll also want a good quality polarizer (Hoya, B+W, Tiffen). Buy the polarizer to fit your biggest lens (perhaps 72mm) and then buy "step up rings" so you can use it on all your lenses. In other words, if you have a lens with a 55mm diameter filter ring and one with 58mm diameter and the aforementioned 72mm, you'd need 2 step up rings: one from 55 to 72 and one from 58 to 72.

2007-11-16 22:47:31 · answer #1 · answered by EDWIN 7 · 1 0

I have a Sigma 70-200 f/2.8 - so I am not anti-Sigma -but for what you are doing I would strongly consider a Canon 100-400L IS (which has rebates on right now). Shooting from a jeep or handheld you will really appreciate the IS. If you decide you do not want to keep it, Canon L glass loses so little value that you will be able to resell it after Africa with minimal loss. Consider it a cheap lens rental! Then you can buy something more suitable to English weather - like an umbrella . . . By the way a 1.4xTC will cost you one f-stop and a 2xTC will cost you 2 f-stops. I had both and resold the 2xTC because I found it degraded image quality too much. I like my 1.4xTC.

2007-11-19 08:26:36 · answer #2 · answered by ajvigants 1 · 0 0

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