Putting a copal 1 150mm f5.6 lens on a copal 3 shutter via adapters, what to expect?

[MartyNL]

Hi all, so since a Xenotar 150mm f2.8 is way beyond my budget, it got me thinking about putting a standard 150mm f5.6 copal 1 lens into a standard copal 3 f5.6 shutter via adapters for the front and back cells.

So will this set-up make my f5.6 lens a much faster lens?
And what do you think I should expect, image wise?

[Oslolens]

Nope, no more light.
Buy a 150mm f3.5 Xenar in shutter, or a 150mm Heidosmat to front mount, or 58-Copal-to 58mm-filter-adapter to use two +3 close-up lenses to get a 166mm f3.7

Also this will cost you, though.
My bokeh tests: https://www.flickr.com/photos/470525...57634939838558



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[Oslolens]

The Copal 3 only has 45mm opening.
My Ilex #5 has 65mm opening, but only changes the f stop from 7.4 to 5.1 on a +3 close-up (333mm) lens. If used on two +3 close-up lenses you end up at f2.55 but might want to use a smaller aperture anyway.
I paid $75 each for my adapter ring for my Ilex #5, but found to my surprise the 14" early Ektar will take 72mm filter straight on.

How big shutter do you have room for?

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[ic-racer]

Hi all, so since a Xenotar 150mm f2.8 is way beyond my budget, it got me thinking about putting a standard 150mm f5.6 copal 1 lens into a standard copal 3 f5.6 shutter via adapters for the front and back cells.

So will this set-up make my f5.6 lens a much faster lens?
And what do you think I should expect, image wise?

If you want to use that method to increase speed, it is much easier to just fit a new aperture scale. Maybe one that goes to f1.4

[MartyNL]

Back to the drawing board, it seems!

[Bernice Loui]

What is the intended goal ?


Bernice

Hi all, so since a Xenotar 150mm f2.8 is way beyond my budget, it got me thinking about putting a standard 150mm f5.6 copal 1 lens into a standard copal 3 f5.6 shutter via adapters for the front and back cells.

So will this set-up make my f5.6 lens a much faster lens?
And what do you think I should expect, image wise?

[MartyNL]

What is the intended goal ?


Bernice

To try and create a Xenotar 150 f2.8 but without the expense!

[Oslolens]

Here is the f3.5 Xenar 165mm, almost there: https://www.ebay.com/itm/26524812608...wAAOSwGO1hBPBj

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[Dan Fromm]

To try and create a Xenotar 150 f2.8 but without the expense!

Fast, inexpensive, good? Which two do you want?

[MartyNL]

Fast, inexpensive, good? Which two do you want?

Fast and inexpensive. Good is relative.