Jump to content

Parfocal Zoom on a Budget


Recommended Posts

I'm looking for a zoom lens for my GH4 with the following characteristics so I can mount it on my Century Optics 1.33:

  • Parfocal
  • Front assembly does not rotate (needs to hold the adapter level)
  • As fast as possible (maybe in combo with speed booster)
  • Covering the focal length the adapter will allow
  • As affordable as possible

This would be for narrative filmmaking. I'm wondering there are any older/vintage zooms that might might fit the bill. They don't have to be perfect, but workable enough for me to get the practice & feel to see if I find it engaging enough to spend for some high quality glass down the road.

I know there are Vivitar f/2.8's that are parfocal, but I don't know which (if any) have a front assembly that remains stationary while zooming/focusing.  I also don't know what maximum focal length the DS-1609 adapter will allow.  I found several topics in these forums which mention parfocal options, but 1) most are roughly $600+ which is out of my price range, and 2) even if I can save enough $ for one of those, it is not clear if any of them have a front assembly which remains stationary during zooming.

Maybe there is no solution that will fit my budget, but I'm hoping there are some experienced Century+Zoom owners out there that can help.  


Link to post
Share on other sites
  • 2 weeks later...

lomo foton 37-140mm is exactly what you are wanting and even has an interchangeable mount. In fact it is designed to work with a anamorphic front as well. It is designed for s35 so not sure if it will cover the sensor. However with all lenses on a still camera there is the issue that you cannot adjust back focus. For a lens to be parfocal its flange focal distance must be correct which could be a problem. The foton does have a back focus adjustment as I recall.


I loved my foton before its aperture failed, they go for $600-$800.

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...