This is a very nice example of a Rodenstock Apo-Sironar-N large format camera objective, 150mm focal length, and f ratio of 1:5.6. It is mounted in a gutted shutter, so there is no aperture iris and no timing mechanism (lens is always wide-open). The lens assembly is in very fine condition, although there are some bits of dust on the elements. No coating blemishes, no delamination, and no scratches or pits in the elements All you need is to mount the lens in a suitable size ‘0’ shutter (such as a Copal 0 or a Syncrho-Compur 0) and you will have a great 4×5 format ‘normal’ objective. The lens image circle is 76 degrees with an image circle of 214mm, so it will accommodate extensive tilts and shifts. Serial number of the lens is 11551585..
***MPN
***OEM Rodenstock
***SKU*** DP233

This is a D.O. Industries ‘Golden Navitar’ projection lens with a Kodak Ektagraphic III focusing mount. The Navitar projection lenses are among the finest produced being exceptionally well corrected for flatness of field and for color rendition. They are the equal of most camera lenses as far as optical performance. They are the objective of choice in many conference rooms and lecture halls..

This particular lens is a fixed focal length version at a very short 1.5” with an f-ratio of 2.8. The very wide angle enables one to place the projector in front of the viewing group – a 10 foot wide screen can be filled with the projector a mere 11 feet 6 inches from the screen.

Furthermore, this particular objective is equipped with a perspective correction device. The front lens of the objective can be moved ‘off-axis’ by up to 3.8mm, the direction of the displacement can be set in any direction and locked at the desired position. The perspective correction feature enables one to eliminate the ‘keystone’ effect created by projecting an image onto a screen that isn’t orthogonal to the projector. With a wide-angle lens it would be typical to have the projector located in front of the viewing audience. If it were placed perfectly in front of the screen, the projector would be in the way of some audience members. Placing the projector on a ceiling suspended shelf, or on a low table in front of the audience would create a trapezoidal image on the screen. Offsetting the front lens of the objective helps overcome this disadvantage. The front lens if marked with a white ring so the amount of offset may be visually checked. This is the same principal used for perspective correcting SLR lenses when photographing tall buildings or architecture from ground level – without perspective correction, the buildings appear to lean away from the viewer.

The wide projection angle places rigorous requirements on the design of the objective so it will remain evenly bright from corner to corner, perfectly sharp, and free of distortions. In addition, all Navitar fixed focus objectives are guaranteed to be within 1% of the stated focal length – it is very easy to match projectors for lap dissolve setups.

The lens is in perfect optical condition. The anodizing on some lenses does show a bit of minor fading here and there, but they basically look great. This was one of the most expensive lenses in the Golden Navitar series – it listed for over $1100 in the mid-1990’s.

BMI Surplus, Inc. has a huge inventory of used, new and pre-owned Camera Lenses for sale.
We will work with you individually to find the perfect set up for your application.
Buy online or give us a call at 781-871-8868. We have experienced customer service representatives standing by ready to help you!

BMI Surplus, Inc. is a dealer in used and sometimes new Surplus Scientific and Industrial Equipment – we cater to clients in search of items to be used for specific applications.
We do not offer a guarantee as many of our items are purchased by professionals in need of parts and pieces.
You will find many of our items listed on our website as untested or as parts or repair units even though they are in good used condition.
*Pricing on untested items is discounted at time of listing.

**Shipping, Handling and Freight fees are dependent on your location.
We will provide a freight quote to meet your individual needs and work with you if you prefer to use your own carrier.
We have 33 years of experience shipping sensitive scientific instruments and industrial equipment!

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***MPN
***OEM D.O. Industries
***SKU*** DP198

This lens, a Schneider-Kreuznach TV Variogon with a focal length of 25 to 125mm seems to be very unusual. . Despite the relatively short focal length at the ‘wide’ end of the zoom range, the lens is simply massive. With the aluminum mounting tube the overall length is 385mm when set to infinity. The diameter of the lens is approximately 100mm across the helical drive gears. The mounting flange is 89mm in diameter (bore diameter is 44.5mm), and there are four threaded holes in a 54.25mm square pattern on the flange. This was meant to be secured to a mounting plate from the camera side of the plate. Weight is another issue with mounting this lens – it weighs in at over 8 ¼ pounds

There is a small geared wheel that adjusts the position of the rear-most element set independently of the rest of the lens – I assume to adjust the ‘infinity’ focal plane to the vidicon tube. The image circle appears to be approximately an inch in diameter and is positioned a few mm inside the tube. Either there was an additional relay lens placed within the camera system, or the vidicon protruded into the mounting aperture. The mounting sleeve is simply attached to the rear of the lens with four screws and is easily removed. It would be fairly trivial to machine an interface to a different camera adapter.

The aperture ring is graduated from f1.72 to f22. It works very smoothly. The zoom function ring is next, graduated every 5mm between 25 and 80mm, thereafter at 90, 100, and 125mm. The focus ring is graduated in both meters and feet, ranging from 1.9 meters or 6.6 feet to infinity. Meters are in white, and feet in green. (Aperture scale is in white, and the zoom scale in yellow-orange). Both the zoom and the focus rings have helical drive rings.

The lens is in perfect optical condition with the exception of a very tiny coating flaw (or so it appears) on the inner surface of the front element. It is only about a mm across – pretty trivial considering the front element is over 72mm in diameter. Otherwise, there are no scratches, delamination problems, or clouding in any of the elements. Cosmetically, the lens is in very fine condition – the most significant issue is a small spot of corrosion just to the left of the small focus compensation wheel in the first photo, and some very shallow dings in the sleeve between the zoom and aperture rings, probably from when the motor drive was attached.

Location MB 54-1

Photo set 549

This piece has not been tested. It may or not be working and may or may not be
complete. Testing is not available for this item.
This item is being sold As Is and is a final sale with no right of return.
Please call prior to purchase with any questions.

BMI Surplus, Inc. is your #1 resource for used, new, pre-owned,
recycled & refurbished photo, audio & radio equipment!.
Buy online or give us a call at 781-871-8868. We’re here ready
to help you!
**Shipping & Freight fees are dependent on your location. We
will provide a freight quote to meet your individual needs and
work with you if you prefer to use your own carrier. We have 30
years of experience shipping sensitive scientific instruments &
industrial equipment. Be assured we ship with the utmost care!

Don’t see what you are looking for? Use our orange search box on the top right hand corner of this page to customize your search.
***MPN
***OEM Schneider-Kreuznach
***SKU*** DP117