weezintrumpete wrote:
Looking for a recommendation for a 40mm - 50mm (equivalent in 35mm terms) lens for the GFX, ideally in the f/1.4 range that doesn't break the bank. Would ideally like minimal vignetting that is easily correctable in post.
Any recommendations? That might be a hard set of requirements
The Mitakon Speedmaster 65/1.4 has an old-school draw wide-open to about f/2.8. It's got a nice amount of undercorrected SA for some glowy wide open shots. CA is mostly okay. Spherochromatism is not well-addressed, but it's nothing you can't mostly clear in post. Flare resistance isn't high, but it flares pretty. It's native mount and on sale right now at B&H.
If you want something with a more modern approach, you could go a bit wider with the IRIX 45/1.4. It's a lovely lens. Great color, generally nice bokeh, sharp but with pleasing focus transitions, all-around well corrected and a brilliant landscaper stopped down to f/5.6 or greater. It's also native mount and on sale right now at B&H.
One of those is your best bet on fast with minimal vignetting at a reasonable price. They're both big and heavy (the Mitakon's about a kilo, and the IRIX is 100g heavier) but they'll certainly beat most 135-format lenses adapted.
Otherwise, something needs to give. You could compromise on the speed and go with something like the Pentax 645 55/2.8, which is an excellent lens and would be fantastic on a tilt/shift adapter. Alternately, you can search for a fast 135 lens that doesn't vignette much on it's format wide open as a starting place.
May 10, 2022 at 10:57 PM
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