The M42 Focusing Helicoid 16-30mm for Carl Zeiss/Pentax from FotodioX is designed for Carl Zeiss and Pentax. The helicoid movement from 16-30mm offers a total of 14mm movement for lens focusing. This macro helicoid can be used with any M42 adapter on either end, allowing you to use M39, M42, Nikon, Leica, and more lenses on any M42 camera body, or an M42/M39 lens (with adapter) on Nikon, Canon, Sony, Olympus, and more camera bodies. This helicoid tube is also very useful for lenses without a focus ring such as enlarger lenses. The macro function of this adapter provides a focusing helicoid that will increase the lens-to-sensor distance, allowing for closer focusing than normally allowed by the lens itself. The greater the length of the extension tube, the closer the lens can focus. This means you can now get macro performance without needing to switch to a specialized lens and you will retain all the normal benefits of your optic when the macro function is not in use. The all-metal design and polished coated surface are designed to guarantee smooth mounting and a long-lasting experience. Although the lens will fit physically, automatic diaphragm, auto-focusing, or any other functions will not operate correctly while using this adapter. In this case, 'stop-down mode' will need to be used when metering since the lens does not have the ability to have its aperture controlled by the camera body. You can shoot with manual mode or aperture priority mode.

Premium-Grade No-Play Adapter    Precise Focusing Barrel    Polished Coated Surface    Made with Lightweight Alloy    Offers Fine Focus Control    H-Tube Has M42 Mounts on Both Ends

The lens orientation on this M42 Helicoid adapter can not be adjusted

This is a manual adapter, so lens functions that rely on electronic communication with the camera body (autofocus, AE metering, image stabilization, etc.) will be disrupted

Focus-By-Wire lenses (such as Canon's STM or Nikons AF-P) requires power to engage the manual focus rings on the lens, since manual lens mount adapters do not power the lens, those lenses will not be able to focus

Set your exposure manually or meter using your camera's aperture priority (stop-down) mode

If your lens does not have a manual aperture control ring, the lens aperture will revert to its default position, which depending on the lens is either stopped down to its largest f-stop or opened up to its smallest f-stop

Helicoid movement from 16mm to 30mm, offering a total of 14mm movement for lens focusing

Useful for lenses without a focus ring and can offer fine focus control for macro photography

This Helicoid tube has standard M42 mounts on both ends and is made with lightweight alloy

Related Questions and Answers

Q: 1. Given that there are no electrical connections passed between body and lens, couldn't it also be used on film SLRs?

A: Yes, you can mount the FotodioX Macro Focusing Helicoid (Nikon G & DX Lenses to Nikon DSLR Body) on SLR camera bodies.

Q: 2. Is that M42 type 2 adapter compatible with the Jupiter 37A 135mm f:3.5 Soviet-made lens?

A: Based on what I could find online about your lens, I would say the FotodioX Mount Adapter for M42 Type 2 Lens to Fujifilm X-Mount Camera is not compatible with your lens. However, the following adapter from Vello can be used instead: https://bhpho.to/4e8Idjf.

Q: 3. Will this adapter work on a full frame Sony Camera ?

A: This adapter will work from M42 mount to Sony E mount camera bodies yes.

Q: 4. Will this work with a Nikon F2?

A: Yes, it is compatible with the F2.

Q: 5. When manual focusing on my Pentax 15 x 30 mm f/2.8 the focusing ring will keep turning past infinity. I never noticed this before, is this normal..?

A: Mine does it as well

Q: 6. Will this adapter allows the Helios 44M 58mm f/2 focus at the infinity?

A: Yes, this adapter supports infinity focus.

Q: 7. How much extension can this helicoid provide?

A: The extension provided by the FotodioX Macro Focusing Helicoid (Nikon G & DX Lenses to Nikon DSLR Body) is approximately 3".

Q: 8. Is the M42 mount adaptable with a Pentacon AV 80mm f2.8 projection lens and either a Fuji Xt2 or Fuji XT5?

A: If the lens has a M42 mount, the Fotodiox Mount Adapter for M42 Type 2 Lens to Fujifilm X-Mount Camera, will be able to mount it to a Fuji XT2 or Fuji XT5, however, it may or may not be able to focus properly, as it is a lens made for a projector.

Q: 9. Will this adapter clear the tab on the Fuji screw mount lenses ?

A: Sorry, this one is not compatible with the Fujifilm lenses that have the tab.

Q: 10. will this adaptor will work with "HELIOS 44-2 2/58 USSR Russian Lens M42 mount Zenit (793)": ?? on Fuji X mount camera ?

A: The FotodioX Mount Adapter for M42 Type 2 Lens to Fujifilm X-Mount Camera (B&H# FOM42FXRFV2) may be used with an unmodified (i.e., M42 mount) Helios 44-2 M42 58mm f/2 with Fujifilm X-mount cameras as a fully manual lens.