Author Topic: Projection lenses  (Read 87280 times)

MEPER

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Re: Projection lenses
« Reply #420 on: April 23, 2020, 13:39:27 »
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

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Re: Projection lenses
« Reply #421 on: April 23, 2020, 13:56:38 »
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

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Re: Projection lenses
« Reply #422 on: April 23, 2020, 15:13:28 »
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

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Re: Projection lenses
« Reply #423 on: April 23, 2020, 18:00:53 »
The 'Old Delft'  (Oude Delft) Splendolux   10.5cm f/3  on the Nikon D600

Thomas Stellwag

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Re: Projection lenses
« Reply #424 on: April 27, 2020, 23:49:16 »
one more with colorplan 90
Thomas Stellwag

Dr Klaus Schmitt

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Re: Projection lenses
« Reply #425 on: April 28, 2020, 11:23:16 »
well done Thomas!
formerly known as kds315

Thomas Stellwag

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Re: Projection lenses
« Reply #426 on: April 28, 2020, 12:44:02 »
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"
Thomas Stellwag

koondr

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Re: Projection lenses
« Reply #427 on: November 07, 2020, 12:34:34 »
Visionar 100mm f/1.6

Toby

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Re: Projection lenses
« Reply #428 on: November 08, 2020, 08:29:29 »
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

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Re: Projection lenses
« Reply #429 on: November 08, 2020, 09:47:20 »
Beautiful imagery Toby. I agree with your points.

  Thanks for sharing it!

Dr Klaus Schmitt

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Re: Projection lenses
« Reply #430 on: November 08, 2020, 12:45:23 »
Still nices ones with this special 120mm Angenieux lens!
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koondr

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Re: Projection lenses
« Reply #431 on: November 18, 2020, 09:05:55 »
Rodenstock XR-Heligon 75 mm f/ 1.1