© Robert I. Sadler, 2011
© Robert I. Sadler, 2011
Review
The king of the doughnut-makers — or so they say.
This lens is a very compact and very light 600mm. The aperture is f/8, but my Canon cameras insist that it is actually f/5·6. It is quite sharp, provided you can actually achieve focus.
Like all catadioptric lenses, this one is also very sensitive to stray light. Keep that hood on and don't point it within 75° of the sun. The wee filters at the back can safely be left at home, as they only work after the fact — but do replace the keeper or put some thick tape over the hole.
Recommended: Yes!