Wednesday, February 10, 2016

Topcon Auto Topcor 3.5cm f2.8

My friend Ferdinand asked if I wanted to swap two of the lenses he no longer needed.  One of them is the Topcor 3.5cm f2.8.  I have a serious weakness for Topcor (not UV) lenses after I got my hands on the 5.8cm f1.8, 10cm f2.8, 135mm f3.5, especially the Auto Topcor 135mm f3.5, which I wrote here.  It was engineered for the visual and touch senses, with exceptional optical quality to match.  How can I say no to the 3.5cm f2.8, which was built and made in the same fashion as the 135mm f3.5?

Auto Topcor 3.5cm f2.8 on Sony A7.  Looks nice, eh?

When the lens arrived, I noted that there was no detent between aperture changes, unlike the 135mm f3.5.  I would say it is likely that the lens was serviced and they loss that tiny steel ball that made the click between apertures.  That's a small disappointment, but not a big deal.  Good for video use though. The lens is just as beautiful to look at, and touch, as the pictures it produces.

The Topcor Family.  Still missing the exotic ones [20mm f4, 25mm f3.5, 58mm f1.4, 85mm f1.8]

This fabulous piece of optical love focuses to 0.23 meters.  When I saw this, the Flektogon 35mm f2.8 came to mind immediately.  Who knows, maybe it's the same formula as the Flek?  The Topcor is definitely better made and better looking than the Flek.  The smoothness of the focusing feels like a hot knife cutting through butter.  Simply a delight to the senses.

There is far more to the good looks and build of this 3.5mm f2.8.  I haven't used it much for infinity focus, but the few pictures I took seems very sharp across the frame when stopped down.  What made my heart melt is the beautiful bokeh this gem produces.  It's simply gorgeous.

I sure will keep an eye out for others I have not yet got, but I know those who have them like will hold onto them, and even when available, probably out of my budget.  But, I am happy with what I have.  All of these four lenses are a joy to use and to play with.

Bokeh No.1

Downtown Toronto @ f8

Bokeh No.2


  1. The optical design of this lens is 7 elements in 5 groups. It is most likely different from the flektogon 35mm (f/2.8 is 6/5, and f/2.4 6/6).

  2. Link to Topcon lens diagrams: