The advantages of a longer tube lens focal length becomes apparent when comparing systems having a focal length range between 160 and 250 millimeters. When the tutorial initializes, theFocal Lengthslider is set to a value of 200 millimeters and the objective exitPupil Diameterequals 17 millimeters....
Tube Lens Focal Length Infinity optical systems feature tube lengths between 200 and 250 millimeters. Useful Magnification Range Determine if objective-eyepiece combinations are in the useful magnification range. Viewing and Projection Eyepieces A discussion of projection and viewing eyepiece systems. Se...
use of the nikon 200mm tube lens (#58- 520) allows these objectives to be integrated to a c-mount camera. magnification 2.5x 5x 10x 20x 50x 100x numerical aperture 0.075 0.13 0.30 0.40 0.55 0.7 working distance 10.3mm 9.3mm 7.4mm 4.7mm 3.4mm 2mm focal length 80.0mm 40.0mm 20.0mm ...
Nikon 200 mm tube mirror Color reproduction Long working distance and large numerical aperture value Na High contrast and z-flare No strain Nikon cfi60 is a good optical technology of Nikon, which meets the advanced imaging requirements. Due to the use of a 60mm ...
Use of the Nikon 200mm tube lens (#58- 520) allows these objectives to be integrated to a C-Mount camera. Magnification 2.5X 5X 10X 20X 50X 100x Numerical Aperture 0.075 0.13 0.30 0.40 0.55 0.7 Working Distance 10.3mm 9.3mm 7.4mm 4.7mm 3.4mm 2mm Focal Length 80.0mm 40.0mm 20.0mm ...
This Korean-made lens has a better (longer) focal length and superior direct-mechanical manual focussing. I'd suggest this Irix 150mm f/2.8 Macro as a better lens for serious macro use, but not for hand-holding as it lacks autofocus and lacks VR.Use it with the FTZ adapter....
-II is focal length "breathing." At minimum focus and maximum zoom, the lens's focal length drops to around 130mm. This bother some people a great deal, but it's never really been an issue for me. If for some reason I needed to work around it, I would add a 20mm extension tube...
DX cameras only. Focal Length top17-55mm.Shot on DX, it gives angles of view similar to what a 26-85 mm lens gives on an FX or 35mm camera.Angle of View top79° ~ 28° 50' on DX.Close Focus top1.25 feet0.36 meters.Maximum Reproduction Ratio top...
Lesson 21:48 - Composition: Change Point Of View (POV), different lens focal length. They suggest the old fashioned idea of wide establishing shot, medium shot then closeup. I think that's a very old technique that's boring. Lesson 3 1:48 - quit playing ...
I read that you can use a adapter to use older Nikon lens. It looks to me that the adapter is not as close to the sensor as it should be. Does that mean the Lens used with the adapter will change the focal length of the Lens ?