Just want to point out that I am JUST starting to review the M42 Takumar database and literally on the very first lens I have found a mistake.
You have the M42 Takumar 105mm f/2.8 as being the same optical formula for the Auto-Takumar, Super Takumar, and SMC Takumar.
The points of order are as follow:
1. There were at least FOUR (4) versions of the lens as follows: Preset/Auto-Takumar/Super Takumar/SMC Takumar.
2. The Preset and Auto-Takumar lenses are NOT the same as the later Super and SMC Takumars. Specifically, the Preset and Auto-Takumars were developed out of the 3.5/135 lens and reduced by one element, yielding 4 elements in 4 groups. The Super Takumar version replaced the Auto-Takumar version in 1962 with a 5-elements/ 4-groups design which was similar to the to the 135mm but with a turned and cemented rear element.
Sorry to bash you with this, but frankly, I'd like to do a review of the Preset and the Auto, and I am thinking that you need to create a new space for these lenses. I can provide photos of each, though I have only just now gotten a copy of the Preset lens. If you care to confirm this information, you can fine it clearly stated here:
Early Pentax Takumar Lenses
Please contact me if you like, as there are other ways we can go. I am pleased to help.
Respectfully,
Seaain Gray