Originally posted by butangmucat
However, is this the resolution of max aperture or best aperture, and how does these compare to modern lenses?
Your best guess is as good as any. There are various claims regarding resolution on FSU lenses and it is difficult to determine their source. Some numbers are traceable to tables at zenitcamera.com, a Soviet camera/lens fan Web site. The claim is that the specs are from official specifications salvaged after the fall of the Soviet Union. I consider that site to be "reliable, but not guaranteed accurate".*
Originally posted by butangmucat
P.S. I have heard that there are dealers who will use name rings to fake a Helios with lower resolution as one with a higher resolution. I saw a copy of 44M-7 that has 8 blades and an A/M switch. Is this normal for a 44M-7?
You are correct that there is a plague of fake FSU lenses. The Helios 44M-7 is one of the more commonly faked models with most being relabeled Helios 44M (8 blades with A/M switch). The 44M is a fine lens,** but is fairly common and not worth a premium price. That being said, I am not sure the 44M-7 is worth more either except that it is multi-coated.
Steve
* This or similar disclaimers is found in realtor's Multiple Listing Service books used for property sales in the U.S. Translation: "We do our best, but if things are not as described, it is not our fault"
** I own the Helios 44M and am perfectly happy with it.