MTO 500mm mirror telephoto lens sharpness test

[@FurreFurre]

A few years late for a comment, but if you have the tools available, I would check if the rear mirror is over-tightened. Once I loosened the back mirror of my lens and tightened it just where the spring engaged the mirror, the lens I have got an increase in sharpness. It appears that in factory the assembly was over-tightened on my lens, causing the rear mirror to deform ever so slightly, which decreased sharpness.

[@-Gothicgirl-]

Good invention for lense like that is a remote

[@GameplayJap]

Oh thank you that's answer need 500 and 1000 these lenses because nature from different eyes is changing 🙂

[@robertro1640]

Have you had stabilisation in the camra body ?

[@mistyfridayfilms]

No, there was no stabilation in the camera body

[@ericson701]

for a low price is it a good lens. I have sony 70 -210 the price 2000 Euro. When i bay i prime 300 i think 8000 euro en 600mm about 15000 euro. Yes the are better. But i can't and will not pay that price. And the mirror have a fast apature and a small range. When you make photo's not full open then correct it the lens ferry fast. A have a look whits the 70-210 F2.8 and the minilota 70-300mm APO. The last is cheaper about 1/4 off the price. Now i whill not more use it. Only problem the wegt off 1,5 Kg.

[@glaurung666]

MTO lens needs temperature equalisation. It must be the same temperature as the environment you're using it in. If it is not, MTO loses sharpness.

[@mistyfridayfilms]

Interesting. Do you mean the lens should be ~1h outside of the bag, if used outside?