Fisheye shooting is a matter of taste; You can enjoy the full potential of the lens in a city-landscape with really high buildings or with this lens recreating Van Gogh type images with the yellow filter, the distorted cubist type images and the lens flare which is just amazing because of the built in filters. No other lens can achieve what this one does.
Regarding sharpness: at f4 is soft (nothing you can “fix” in PS with USM filter), but from 5,6 to f22 is sharp in the centre. F8 and above is as sharp as other m42 lenses.
Colour rendition and contrast are as expected of a Takumar lens, very nice colour-contrast rendition.
IF you want a lens for normal photography…. Do not buy this one.
You almost always get flare as the glass sticks out the front of the lens. No lens hood and no screw mount to add one. BUT
if you want lads of fun playing with flare and colour, a sort of mix between Van Gogh, Monet and Picasso…… this lens is a MUST.Summary
This not an everyday lens, but if you want to expand your creativity then a nice fisheye is a must in your lens collection and you will find it hard to find better at the price but be careful, the lens glass sticks out so often gets scratched and so many elements to separate to get fungus…… buy carefully
For images using this lens click HERE
For general information on lens design and lens elements go to the homepage HERE