Industar-50-2 filter thread size?

BigMack3000 · Joined: 18 Apr 2012 Posts: 17

I picked up a black Industar-50-2. Sr# starts with 73. From what I've read online, I thought the filter thread was 35.5mm. However both a lens cap and filter I bought in that size are too big. It seems that the outer wall of the aperture ring only measures 36mm. I found a post from 7 years ago on another forum that said a 33mm filter worked for his lens. Before I dive into a filter or step up ring for that size, can anyone confirm it would work? Thanks.

Also does that mean a filter like this:

http://www.ebay.com/itm/350493250441?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649#ht_1116wt_1094

won't actually fit even though it's marketed for that lens, or is the filter not actually 35.5? What am I messing up here?

themoleman342 · Expire: 2013-01-24

Yes, I believe the size of the filter thread was changed in the mid-late 70s from 33mm to 35.5mm. One from '73 should be 33mm.

BigMack3000 · Joined: 18 Apr 2012 Posts: 17

Thanks. I also just saw that you asked the same question a couple years ago. Mine has the same symbol with the arrow as yours from 71, so I'm sold.

Thanks again for your help.

jjphoto · Joined: 17 Mar 2009 Posts: 406

Are there 2 versions of the Industar 50-2 (with different filter threads) or are you guys talking about the Industar 50 (M39)?

My Indsutar 50-2 (M42) has the 35.5 thread.

JJ

themoleman342 · Expire: 2013-01-24

All Industar 50s have 33mm threads. When the 50-2 was introduced it too had 33mm threads but this was later changed to 35.5mm. If yours was made after '75-6ish, yes, it has 35.5mm.

jjphoto · Joined: 17 Mar 2009 Posts: 406

ChromaticAberration · Joined: 23 Dec 2010 Posts: 819 Location: Portugal

I have the original hood and cap for this lens and what I can say is that the hood is made of plastic and you just push it around the aperture barrel not screw in as usual) and the cap simply falls, it is not tight enough. Not exactly fine pieces of craftsmanship, accessories wise, these Industar 50-2 =P

Lloydy · Expire: 2022-01-01

I chop the bottom off 'GU Pot' desert containers to make hoods for the Industar. They are very flexible black plastic flared pot, cut them off so they are a tight fit on the lens. I take the gloss off the plastic on the inside of the 'hood' with a Scotchbrite pan scourer.
I like the chocolate desert, so I have steady supply of pots, I don't care if I lose them ! Very Happy

gsmendelson · Joined: 06 Feb 2019 Posts: 1 Location: jerusalem, israel

February 2019 update. There are many digital cameras with 37mm filter threads, eBay has all sorts of filters, lenshoods, etc for sale relatively cheaply. 35.5 to 37mm step up rings go for $2-$3 from China. The same with 35.5mm to 49mm rings, but they are closer to $5.
From the EU, they are around $30 each.
There are still many of these lenses around, you can pick one up at auction for $20 including postage. For $30 there was one for sale with a factory lens hood. Caveat emptor, the only hood sold by itself was also $30.
If you have a Nikon camera, the farthest they will focus is about 4 meters. For $28 plus postage, you can buy one modified mechanically for infinity focus.
If your Nikon camera has an AI coupling ring, it will meter properly with the lens. and confirm focus. Obviously it will be at the F stop set on the lens when you meter, no automatic diaphragm.

Rosedalelad · Joined: 18 Oct 2018 Posts: 15

I recently bought a mint Industar 50-2 1973 vintage and it has the 33mm filter thread as stated in the above replies. I had the opportunity of buying an Industar lens hood cheaply so I did - but the diameter was too big to fit over the aperture ring - so it must be for the later 35.5mm version. Five minutes with a bit of black tape fixed that.

Industar 50-2 lenshood by Andrew R, on Flickr

But it does look strange