tested Industar 50-2 Soviet black pancake lens SLR 3.5/50 M42 mount KMZ Zenit

Industar-50-2 (Индустар-50-2), black pancake lens for SLR camera 50 mm, f/3.5, M42 mount, s/n 8011_6569 Krasnogorsky Mechanical Plant (KMZ), Krasnogorsk, USSR Very good condition. Lens is clear and does not have any fungus or scratches. Inside there is microdust and dirt. Aperture and focus rings rotate properly. Body has small signs of age and use. Camera "Zenit B" is not included and is shown as an example of mount. I took photo with this lens mounted on DSLR "Sony A-100" via adapter. Test photo is #2. This is a standard lens for Soviet rangefinder and SLR cameras: "Zorki", "Zenit", "Crystal" instead of "Industar-22" lens. It was designed in 1953 and produced since 1953 till 1986. This lens was made in 1981 at Krasnogorsky mechanical plant named after Zverev (KMZ), also it was produced at LZOS (Lytkarino) and KOMZ (Kazan). The lens uses the "Tessar" lens scheme. The lens is anastigmatic and antireflected. Diaphragm numbering is doubled. Lens had foldable and unfoldable versions, variants for SLR, rangefinder and enlarger. This lens is very-very small and lightweight. You can easily put in your pocket, and the hardest camera will seem lighter with this lens. It is very cheap. But at the same time it has a perfect sharpness thanks to the "Tessar" scheme. Chromatic aberations are corrected. Bokeh is rather nice. Сharacteristics: Lens s/number - 8011_6569 Number of lenses - 4 in three groups. Angle of view - 45o Number of aperture blades - 7 Limit of aperturing - 1:3.5 (max), 1:16 (min) Resolving power - (centre/edge) 38/22 lines/mm Minimal distance of focusing - 0,65 m Type of thread - M42x1/45.5 Type of thread for the nozzles - 35,5 mm Dimensions (mm): 50*50*26 Focal distance - 52,48 mm. Mass - 69 g ---------- Conditions: Economy shipping to the address stated at Pinkoi with tracking number, usually sent within 3 business days after payment. See the photos for details. Photos are actual - that is exactly the lens you will receive. Please, do not hesitate to contact me for any information required. Please, watch my other items. I combine shipping - write to me what items do you want to buy, and I will calculate the discount for combined shipping. Package is packed thoroughly and carefully and marked as a “gift”. If you need to add invoice in the envelope or not to mark as a “gift”, write to me. If you are interested in terms of shipment - write to me, and I will tell the minimum, maximum and average time of shipment to your country (I accumulated vast statistics). Return shipping (if the item is as described in the ad) is paid by the buyer. My price include the item and shipping cost and does not include Duties, Value Added Taxes, Customs Clearance Fees and other charges. These charges are the buyer's full responsibility. Please check with your country's customs office to determine what these additional costs will be before bidding/buying. Buyer needs to pay for the above fees in case that occurred for certain goods. If the package returns back to me due to the buyer refuse to pay those fees, I would not send the package again unless the buyer completes those fees and pay all the return and resend cost. Buyer can not cancel the order or request refund due to this reason. All the customs clearance and other affairs that can be necessary to get the package in the buyer’s country is buyer’s full responsibility. Please, be sure that you are aware of your post office working time, order and rules of package delivery and be ready to accept the package. If the package returns to me as “unclaimed” or the tracking system shows “unsuccessful delivery attempts”, refund to the buyer will be paid deducting the shipping and return costs. Resending must be paid extra.