Tom Carmody
Member
Which lens would you choose if I price and weight were not an issue? (I know that this may sound like pure fantasy, but in certain circumstances these factors may not be the deciding factors.) My concerns are primarily image quality, and then convience in use. I imagine using either lens mounted on a sturdy tripod with a Wimberley Gimbal head, and as such weight doesn't seem to be an issue - both lenses/camera(Canon 1DII or 1DSII) tripod rig will weigh a lot to transport, but once set up it would be a non factor as I will not be moving from location to location once in use. I also would envision using the 400 2.8 with either the Canon 1.4X tele-converter or the Canon 2X tele-converter to approximate the focal length capabilities of the 300-800 zoom. The Sigma 300-800 5.6 lens could also be used with the tele-converters to further extend its reach, with manual focusing and a dimmer viewfinder. (I assume that the zoom is combatible with the Canon tele-converters. Whether or not they are better with this lens than Sigma's own tele-converters is a discussion for another day.)
I understand very well that the Canon 400 2.8 lens is one of the sharpest lenses made by any manufacturer. I also understand that the 2.8 aperature will enable a lot of photos that will not be possible with the 5.6 aperature of the zoom lens. My thoughts are that the convience of the zoom lens in choosing the proper focal length for framing may outweigh the benefits of lens speed and possibly quality of the 400, also that when used with a tele-converter, the zoom lens will give a range that is not available with the 400. I would appreciate your thoughts on this matter.
I should add that the intended purpose and subject matter will be sports from an elevated position (press box), some Bird/wildlife photos, and some surfing photos. I thank you for your input.
I understand very well that the Canon 400 2.8 lens is one of the sharpest lenses made by any manufacturer. I also understand that the 2.8 aperature will enable a lot of photos that will not be possible with the 5.6 aperature of the zoom lens. My thoughts are that the convience of the zoom lens in choosing the proper focal length for framing may outweigh the benefits of lens speed and possibly quality of the 400, also that when used with a tele-converter, the zoom lens will give a range that is not available with the 400. I would appreciate your thoughts on this matter.
I should add that the intended purpose and subject matter will be sports from an elevated position (press box), some Bird/wildlife photos, and some surfing photos. I thank you for your input.