Tale of Two 50mm 1.7's

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Today I picked up a rather old 50mm 1.7 lens for $15, took it home and examined it next to my current 50mm 1.7 and noted the following differences:

Old 50mm 1.7: Close Focus ~18 inches New 50mm 1.7: Close Focus ~21 inches

The Old one also has a somewhat more deeply recessed location of the front lens element. Glass is nice and clean The older one is a little longer (about a front filter-width) and is a little "beefier" in the focus-ring. Coatings appear identical, but I do not know the number of elements & groups in the two.

I'm planning to do some Stereography with these two, and I wanted to get a good matched set. Can anyone comment on the +'s and -'s of the Old and the New?

My initial reaction to the old lens is quite positive; the closer focus and the deeper lens placement seem like Good Things. Does anyone know of possible performance issues with either one?

Also, anyone out there interested in Sterography...?


-- Anonymous, March 15, 2001



Hi Tom,

I really don't know much about it, but have seen two custom stereo setups sold on eBay in the past year, both using FT-1s, as I recall. I would guess the FT-1 lends itself to synched photography thanks to the electronic cable release. I'd suggest looking on photo.net for other folks doing stereo work. Good luck with your project!

Alan Myers San Jose, Calif.

-- Anonymous, March 15, 2001

2 Different 50mm f1.7's

I have two different 50mm f1.7 lenses the same as yourself. If you need to get a match set, I have one I can offer to sell you.


-- Anonymous, March 19, 2001

Different 50mm f1.7's


Thanks for the offer, but I don't know which one I'd want to get!

Both of these seem quite nice. I like the older one because it focuses a little closer and the deeper recessed front element keeps flare down to about zero. The newer one is lighter weight (a little) and I'd suspect better designed, though I do not know that for sure. I think the coatings on the newer one are a little thicker.

Anyone KNOW the design details? Any guess as to which would be better for use with some extension rings or bellows for Macro work?

-- tm

-- Anonymous, March 20, 2001

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