tested MC Helios 44M-5 2/58 Russian lens M42 mount Valdai Zenit export version

MC Helios-44m-5, black lens for SLR camera 58 mm, f/2, M42 mount, s/n 9124_8069 "Jupiter" plant, Valdai, USSR Very good condition. Fully working. Lens is clear, without any fungus or scratches. Inside there are microspecks of microdust. Aperture and focus rings rotates properly and fluently. Body has very small signs of age and use. Lens was tested with DSLR "Sony A-100". Test image is #2. Camera "Zenit ET" is not included and shown as an example of mount. This lens was designed at Krasnogorsky Mechanical Plant. This is a representative of vast "Helios-44" family, that was based on German Carz Zeiss Jena Biotar 2/58. Firstly it has a name "BK" - Biotar from Krasnogorsk. Optical scheme was calculated in 1951 at State Optical Institute. Lens was produced in 1958-94 at three plants: KMZ, BelOMO, Jupiter with four possible mounts: M39, M42, Pentax-K mount, Start. This is one of the most popular lenses in the world. It is the only lens in the world which was marked after the quality measurement according to its quality (for example, "Helios-44M-4" has the lowest quality, "Helios-44M-7" - the highest). This lens has a jumping diaphragm and needs a proper camera to activate the aperture (a pin on the rear side of the lens must be pressed and the aperture will close till the meaning set). Red letter "R" on the body must be put when taking picture on infra-red film. When mounted with adapter on Canon, for example, its focal distance will be: 92,8mm (for APS-C), 75,4mm (for APS-H). Lens s/number - 9124_8069 Number of lenses - 6 in four groups, Planar Angle of view - 40o Number of aperture blades - 6 Limit of aperturing - 1:2 (max), 1:16 (min) Resolving power - (centre/edge) 41/20 lines/mm Minimal distance of focusing - 0.5 m Type of thread - M42 mount Type of thread for the nozzles - 52 mm Dimensions (mm): 42*64*64 Focal distance - 58,60 mm. Mass - 234 g Muli-layered anti-reflection coating ---------- 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.