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Perceptual Development Laboratories 2 inch f1.5 Perceptor Le
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PostPosted: Sun Mar 07, 2021 11:03 pm    Post subject: Perceptual Development Laboratories 2 inch f1.5 Perceptor Le Reply with quote
That should have been "Perceptor Lens“, but looks like no way to correct a post title. Sorry

Ran across this on eBay for $34 with free shipping, so had to give it a shot. It turns out to be a very well made projector lens for 16mm I guess. I had figured it for a Bell and Howell rebrand, but it is something else altogether. Clearly a Petzval design, but this lens is massively sharp in the center, and the Petzval distortion is well controlled at the edges. It has excellent contrast with a touch of LoCA, and the bokeh balls are very smooth and even, though of course they get oval at the sides. It covers APS-C perfectly, with a little to spare. I'm posting some FF examples. These are SOOC, and just some quick shots to test.

I couldn't find out much on the Internet except this on a boardgame wiki:

Headquartered in St. Louis, this publisher seems to have focused on a variety of educational products, including animated films.

#1


#2


#3


#4


#5


PostPosted: Mon Mar 08, 2021 7:40 am    Post subject: Reply with quote
Quite nice Toby!

The number of characters in the title line is limited, so it cuts off...


PostPosted: Mon Mar 08, 2021 2:30 pm    Post subject: Reply with quote
Could it work better on a m4/3 sensor? I'm having an option to get a nice G80 for around 200 ,but have no clue if would work well with manual lenses (I used EM5 before and was pretty good) .


PostPosted: Mon Mar 08, 2021 7:45 pm    Post subject: Reply with quote
kiddo wrote:
Could it work better on a m4/3 sensor? I'm having an option to get a nice G80 for around 200 ,but have no clue if would work well with manual lenses (I used EM5 before and was pretty good) .


This lens actually has enough image circle to cover APS-C, not only MFT, which would cut off the nice swirly edges


PostPosted: Tue Mar 09, 2021 4:34 am    Post subject: Reply with quote
You mostly manage to find the very not normal lenses , I really like the bokeh,but I assume it's not an easy to work lens


PostPosted: Tue Mar 09, 2021 8:58 am    Post subject: Re: Perceptual Development Laboratories 2 inch f1.5 Percepto Reply with quote
kymarto wrote:
Clearly a Petzval design, but this lens is massively sharp in the center, and the Petzval distortion is well controlled at the edges.


#1 and #5 look spherical to me. Like the image is a reflection in a drop of water. Is that in some way due to the Petzval distortion you refer to? The Petzval design is an area I've never looked into.
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