All Pix & Test Shots
https://drive.google.com/drive/folders/1hC0jk4OU_KEcJliBUlM9IzkXI-j8brec?usp=sharing


Lens
1. One most under-valued M lens. 40mm focal length makes 50mm and 35mm virtually redundant. That’s why 40mm Cron is only in Leica’s most difficult days.
A golden foto rule: A most appealing focal length is one equivalent to film’s diagonal.
And 40mm Cron is it:
https://drive.google.com/file/d/1mwLkwdxZQQfm1DIGgNIcMY3ZPNk7Zdrg/view?usp=drive_link

Sales of 35 and 50 Cron would wither should 40 Cron be a regular make.

2. Hence, Summicron-C 11542 (’73-77) was made to save Leica out of financial crisis brought along by M5’s debacle.

This lens (Lens) #2633957 (’73) is a ‘Year One’ Production, hence has some collection value.

Cosmetically mint, optically pristine, exceptionally well kept.

3. 40 Cron is also among Doug’s favorite Ms. He spent hours fully overhauling this one.
Service rendered include

(1) Meticulous cleanse of all optic surfaces, which, apart having slight haze, are nearly perfect
https://drive.google.com/file/d/132HmsCHMw8cfJ0bKWzC9vnyp_hh6adJj/view?usp=drive_link

(2) Complete degrease & overhaul of aperture blades
https://drive.google.com/file/d/19geF-6Ib--pLwNYNCvdzo8Tyb5kMA-Of/view?usp=drive_link

(3) Above all, fully disassembly, overhaul and calibrate of focusing system
https://drive.google.com/file/d/1ZWvcVKufWAlqVv_YKMioef-OqJdothbr/view?usp=drive_link
https://drive.google.com/file/d/1yHUWW1LrV92mf5uB7wdcy-NHw8uP8tPp/view?usp=drive_link
before:
https://drive.google.com/file/d/1XLKk2tESnt3rkjlNIiqZWkIG5EGLylx8/view?usp=drive_link
after:
https://drive.google.com/file/d/1kXy04A2xuqAlu-R_6amIiKHym8-AbjbE/view?usp=drive_link

Workload, speaking of servicing a 40 Cron, is tremendous.


It’s been a concern (esp. among older generation) over Cron-C’s alleged focusing shift.
According to Doug, some Cron-C do exhibit minor shift.
But this one, wide-open at minimal distance, is spot on. Focusing accuracy is truly remarkable (focal point: Doll’s eyes)

Sharpness & Color Rendition Brilliant:
DNG
https://drive.google.com/file/d/15mMdrb4qSGLS8B4puFmeGywXu9AYkExp/view?usp=drive_link

Impressive Low-light performance:
https://drive.google.com/file/d/1DA42x4T0trpFuWGvj6rmIjZGSHp8y8ig/view?usp=drive_link
https://drive.google.com/file/d/1ykyQokxSIqD5Jy-VZumzpaIuHppgjxT-/view?usp=drive_link
https://drive.google.com/file/d/13D64JUwc7fbBIQc9vDFrvwPAITWGb7sO/view?usp=drive_link

It’s even in better condition than many 6-Element (Summicron 35/2 11309, 1969-79) and outperform them.

Accessory
1. Original front Cap: 14191
2. Original rubber Hood: 12518
3. Rear Cap: generic