D.O. Industries Golden Navitar KE f 3.5 Projection Lens
$250.00
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!
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 D.O. Industries
***SKU*** DP198
1 in stock
Description
Description
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!
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 D.O. Industries
***SKU*** DP198
Additional information
Additional information
| Weight | 2 lbs |
|---|---|
| Dimensions | 5 × 5 × 6 in |
