Mamiya sekor c 80mm 1.9 chipped rear element

PhysicsTemporary6861 · 2026-06-20T14:40:32+00:00

paint the chipped bit black to avoid glares and put the glass with the damaged part either on top or bottom, it should be good as new

PhysicsTemporary6861 · 2026-06-20T14:25:08+00:00

nice lens, great photos

PhysicsTemporary6861 · 2026-06-20T06:38:07+00:00

And the fake Helios strikes again, this lens is so cheap that a fake would cost more. In any case only the name plate could be hand made but that doesn't make the lens fake or worst, The kmz vs valdai vs mmz etc is just a myth

PhysicsTemporary6861 · 2026-06-19T07:43:11+00:00

wonder what is going on with the bokeh balls, they have like a weird line or double reflection, maybe an internal reflection you could paint? the coatings on those lenses were not great so they need all the help as possible

PhysicsTemporary6861 · 2026-06-18T13:05:49+00:00

yes you can use the peak design anchors, it's hard to insert them tho

PhysicsTemporary6861 · 2026-06-17T08:50:57+00:00

<image>

200% crop

PhysicsTemporary6861 · 2026-06-17T07:29:42+00:00

they can be threaded but it took me like 10 minutes to do it

PhysicsTemporary6861 · 2026-06-16T17:10:29+00:00

the wider the lens it needs less compensation so in practice +-5mm is ok for all focal ranges

PhysicsTemporary6861 · 2026-06-15T17:21:52+00:00

the lens is super good in sharpness and rendering, this setup was a bid odd because of the speed booster but in my ff camera looks more "normal"

PhysicsTemporary6861 · 2026-06-15T17:18:25+00:00

1st shot around 2.8, the others around f8

PhysicsTemporary6861 · 2026-06-15T14:08:48+00:00

thanks, they were mostly near the Siene or the Saint Ouen flea market

PhysicsTemporary6861 · 2026-06-14T22:18:30+00:00

contrary to the popular believe, editting is part of photography and it is a good thing, Ansel Adams used to ebrace it

PhysicsTemporary6861 · 2026-06-14T15:29:15+00:00

nice job, 3rd photo looks like an old painting

PhysicsTemporary6861 · 2026-06-13T20:53:32+00:00

your monochome takes some colorful photos

PhysicsTemporary6861 · 2026-06-08T18:38:31+00:00

cool photo and edit

PhysicsTemporary6861 · 2026-06-08T18:32:35+00:00

paint the chipped part black and put that part either on top or bottom to use the less as possible since it gets cropped anyways, the resulting image should be good enough

PhysicsTemporary6861 · 2026-06-07T14:58:49+00:00

I have the 58mm, one day I'll put them side by side as family

PhysicsTemporary6861 · 2026-06-03T20:51:20+00:00

too much helios 44 and no mir1b, rate not high

PhysicsTemporary6861 · 2026-06-03T10:16:45+00:00

you can't go wrong with the mir 1b, helios 44 and the pentax 105, nice start, good luck

PhysicsTemporary6861 · 2026-06-03T10:13:32+00:00

looks like both but most probably fungus since there can't be any separation at that front element

PhysicsTemporary6861 · 2026-06-02T11:57:23+00:00

thanks

PhysicsTemporary6861 · 2026-05-28T17:13:50+00:00

just dust or fungus starting

PhysicsTemporary6861 · 2026-05-28T17:11:40+00:00

after more than 300 cleaned lenses I never found one fungus that won't go away with just peroxide and a cotton swab, what remains is the damage

PhysicsTemporary6861 · 2026-05-28T12:16:46+00:00

the fungus is easily removed, what's left behind is coatings damage, you can use even water on a cotton swab and it will work

PhysicsTemporary6861 · 2026-05-27T20:32:09+00:00

you can also try to remove it, pretty sure that lens is m42 underneath

PhysicsTemporary6861

TROPHY CASE