Projection lenses

[MEPER]

Yes, but otherwise an elegant solution to work the M42 adapter a little so it fits the 42.5mm barrel and then mount the helicoid using screw mount. To secure a M52 helicoid you would use a "set screw" or friction solution via a ring that makes the 42.5 mm barrel thicker?

I like the pictures he shows at the beginning of the video using this lens.

[MEPER]

It was a 52 to 43 step down ring he uses to begin with......I just realized. There are many rings to be confused about…….

[dickb]

Yes, but otherwise an elegant solution to work the M42 adapter a little so it fits the 42.5mm barrel and then mount the helicoid using screw mount. To secure a M52 helicoid you would use a "set screw" or friction solution via a ring that makes the 42.5 mm barrel thicker?

I like the pictures he shows at the beginning of the video using this lens.

It was a 52 to 43 step down ring he uses to begin with......I just realized. There are many rings to be confused about…….

The overdose of separate elements can be intimidating, but you do get many options to get to your optimal setup, either for a single lens adaptation or for a system you can adapt many lenses to.

There are a few little things that can be frustrating when combining many rings and tubes:

- the internal diameter of rings and tubes can vary quite a bit. Some helicoids have fairly large flanges or baffles or internal constructions that restrict the internal diameter. Don't expect an M42 helicoid to have an 42mm inner diameter over its entire length.

- check the orientation of the threads in your setup. I like to use a 58mm reverse adapter to Sony E for my camera, so I need a female 58mm thread connected to my projection lens.

   

[John Geerts]

The 'Old Delft'  (Oude Delft) Splendolux   10.5cm f/3  on the Nikon D600

[Thomas Stellwag]

one more with colorplan 90

[Dr Klaus Schmitt]

well done Thomas!

[Thomas Stellwag]

well done Thomas!

thanks Klaus
I know it is not portrait light - frontal makes faces boring, I was just playing with Henrys VNex - some time ago -
this lens imo is strong in handling any colour or tonality, see skin tones, it has a nice bokeh and it is energy saving  , you do not always need to write "shot wide open"

[koondr]

Visionar 100mm f/1.6

[Toby]

Here are a few from a rather rare Angenieux TV1 120mm f1.2 projection lens. This beast was designed for a prototype Philips TV projection system in the 1960s that never made it into production, so not many of these were made. Since the resolution for TV at the time was very low, and the CRTs not too bright, precedence was clearly given to speed over performance with this Petzval lens. It has a lot of highlight blooming when in focus, and when the contrast is highest, the image is not in focus, so it is a game of tradeoff between the two. Nevertheless, I have gotten a few interesting images out of it, and I think it would be perfect as a soft focus portrait lens

[golunvolo]

Beautiful imagery Toby. I agree with your points.

  Thanks for sharing it!

[Dr Klaus Schmitt]

Still nices ones with this special 120mm Angenieux lens!

[koondr]

Rodenstock XR-Heligon 75 mm f/ 1.1

[Dr Klaus Schmitt]

Rodenstock XR-Heligon 75 mm f/ 1.1

Nice, but not really a projection lens, as it is from a Xray machine ;-)

[Matthew Currie]

While rummaging in the barn the other day I came across a forgotten slide projector, with a 5 inch Wollensak lens. All its optics are at the outer end.  For other macro work I found a T mount with an extension tube whose threads are sloppy enough to screw into the mount and accept a Pentax threaded lens, and found that with the barrel shortened a little, I can slide the Wollensak on and get infinity focus.  The primitive sliding focus is a little sloppy and hard to get right,  and the lens is not killer-diller sharp, but it has an interesting look, I think. 

[Toby]

This is nice! What is the maximum aperture of that Wollensak?