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Got myself a Minolta 250mm F5.6 and it is perfectly usable, sure if you pixel peep it will look like shaite, but it in many situations it doesn't matter. That lens is also extremely compact for what it does so it is a compromise i am willing to live with.

>>4315166
I just picked up the RF Rokker 500mm f8.
So far its pretty cool.

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>>4315155
They're aight I guess, I have an Olympus 500mm f8 that I acquired for a reasonable price.

Only gripe is that it's very finicky to focus even with the long throw focusing ring, we're talking about .5 millimeters margin of error. My copy has pretty bad balsam separation but there's some good sharpness especially for a catadioptric.

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>>4315155
what are these lenses good at? besides being cheap? I don't think they have a purpose

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>>4315502
being able to scale up to stupid sizes for telescopes

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>>4315502
Their purpose is having a supertele length in a "compact" size, IQ be damned

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>1500mm f3
>sub 1ft resolution from 160 miles

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Nikon made one in the pre-AI days called a 500/5 that was actually very good.

>>4315155
What the hell is that in the center of the front element?

>>4319635
Secondary mirror.

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>>4319671
dslr fags be like:
>mirror? We already have a mirror.
>what about second mirror?

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>>4323335
problem?

>>4323335
What about SLR fags, zoomer?

>>4323342
no one cares about millennial hipsters, go watch harry potter you fuck

>>4323345
>every single-lens reflex camera is digital to me because i'm 11
Suck my hairy pooter, fag.

>>4323349
>hipster
>digital

>>4323351
>be such a zoomer that you have literally never typed slr before, just dslr
>call people hipsters because they pointed out how you're a gay virgin

>>4323354
>t. hipster

>>4323357
>too dumb to realise dslrs are slrs and you can just say slr instead of needlessly specifying a particular type of slr
Because you're an idiot and a zoomer.

>>4323362
>t. hipster

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Got this little guy today, excellent condition in its box with all accessories for £150. I got it more as a collector's piece (being the only AF mirror lens made) as I already have a faster 500 with IS but if it has reasonable image quality it might actually see some use being so much smaller and lighter.

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>>4323362
What about SLT's???????
sczhequemaute

>>4324111
I've owned a number of mirror lenses and have never liked the image quality. Hoping you post a comparison between the two.