I’m looking for a lens to use for 4x5 aerial photography of historic sites. No shifts needed. Hoping for working aperture and shutter speed of f/8 @ 1/500 sec. I usually shoot Ilford 400 and rate it 240.
1. SHARPNESS AT f/8:
To maintain decently fast shutter speed, I am wondering: what is the sharpest reasonably-priced (let’s say <US$600) lens, corner-to-corner at f/8? I’m cognizant that this is a challenge yet want to find a decent solution.
2. EVEN EXPOSURE/ MINIMAL VIGNETTING, UNSHIFTED ON 4X5:
Also, I want to avoid the filter factor of a center filter, yet want even exposure (as much as possible) across the image if possible. I’m thinking that moving more toward a “normal” focal length (for 4x5] may help in this regard. Is that a correct assumption that eg a. 125mm may have less vignetting than a 90mm? And that a 150mm may have even better across the frame illumination, given item #3 below?
3. Lesser consideration: weight. Camera will be hand-held. That being said, I really like heavy gear. Ha! Remind me that I said this later.
4. REVISED: Any shutter size is fair game within reason. Update: its appears that to get ~1/500 sec shutter speed, I need Copal 0
Will likely be mounted on a field camera still researching all of this.
Wishing you great light!
Paul
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