bruce_forman

<p>Hi. I need to reverse a tripod head mount from 1/4 inch to 3/8 inch screw on a new velbon 640 tripod to fit a separate head i purchased. The tripod specs say the head is reversible. Could someone please help me figure out where/how to reverse the head mount screw?<br>

Thanks!</p>

<p>thanks for your responses. in alaska, i intend to visit kodiak island and do a day or two of fly-outs to the katmai coast. sounds like a 500mm f4 would be an extravagance. still tempted. :)</p>

<p>hi. i'm fortunate this summer to travel to alaska in august and botswana in september and want to make sure i have the right equipment to capture the wildlife especially. i'd appreciate any recommendations on the camera body, lenses, monopod/tripod.<br>

camera: i'm biased towards the 7d because of price and crop factor-is there a compelling reason to buy the 5d mkii instead?<br>

lens: disposed to buy the 100-400mm L; does a 1.4x extender work well with this lens and/or worthwhile? also considering renting a 500mm f4 which would cost around $500 for 2 weeks as well. worth the expense?<br>

camera support: if in a open-air land rover or on a boat, would one be better off with a sturdy monopod or tripod (type?) to support a 100-400mm or 500 f4 lens given space constraints?<br>

thanks for your help.<br>

bruce</p>

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