Image courtesy: ePhotozine.
One of the strangest new products of the Photokina show is the new Voigtlander 40mm f/2.8 Heliar lens. The strange part is that one: It’s an M-mount lens that you can not(!) use on M-mount cameras (no helicoid to focus). It has been designed to use in combination with the [shoplink 29312 ebay]VM-E Close Focus Adapter (here on eBay)[/shoplink] only. And it has been designed and optimized for the Full Frame E-mount(!). The lens is very compact and weights 112grams only. It’s a collapsible lens.
Here is the full press text:
The Heliar 40mm F2.8 is designed only to be used with Voigtlander VM-E Close Focus Adapter. It does not have built-in helicoid. Focusing is done by rotating the helicoid of VM-E Close Focus Adapter. Super compact style when the lens is collapsed.
The Heliar 40mm F2.8 is manufactured only for the purpose of using this lens onto E-mount camera body via VM-E Close Focus Adapter. You can not do focusing when you mount this lens via adapters not designed with built-in focusing-function or M-mount camera body directly. If you collapse the lens on M-mount camera body, it might result in damage the equipment. Any claims or damages due to improper use of this lens, which it was not designed for, are not covered by the warranty.