Ko 120m

It is autumn. Me think that some of the projection lens I use capture well the mood of autumn.

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Ko 120m

Please support mflenses. Home DIY. Supporting Member. View previous topic :: View next topic. Paragon19 Joined: 26 Dec Posts: Paragon19 wrote: This isn't a new find by any means, I've seen it adapted elsewhere, but I noticed there are no threads about it here, so I figured I would share mine. The LOMO KOM is a large projector lens of very simple construction, using two cemented doublets at opposite ends of two large, screwed together metal tubes. The rear of the lens is The front is 72mm and also threaded. Several This appears to be measured from the rear element however, not the rear housing, as I found in practice the distance was shorter. This required a little extra work to adapt.

Focusers for such lenses can be found on AliExpress today, but for this lens, made even ko 120m they appeared on the market, a simple multi-pass duralumin helicoid was made, providing a ko 120m short minimum focusing distance about cm and a soft, smooth motion of a heavy lens block. The adapter also didn't include a stop screw, which can make the lens a little hard to remove sometimes as it can be turned beyond the normal stopping position and will catch on the mount, ko 120m. And life still goes on

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I express my gratitude to Andrey Mikhailovsky for the opportunity view of the lens 'KO' 1: 2,1 fcm. By the logo of the manufacturer, you can find out that the lens was released at the Zagorsk Optical and Mechanical Plant. The production year is unknown. Lens 'KO' 1: 2,1 fcm is projection lens for 35mm films, not to be confused with a motion picture lens. The front of the lens is screwed together as shown in the photo below. The lens consists of only a few lenses, or rather 4 lenses in two groups, with one group of lenses located in front of the lens, and the other group of lenses located behind the lens, so the lens in its middle part is empty and filled with air. The lens has an aplanat scheme - 4 lenses in two positive glues. There are also similar lenses: KOM 1: 1. View of the lens KO f2,1 mm.

Ko 120m

Being one of the first lenses converted in this version, the KOM looks a little awkward, but inspires respect for its appearance. KOM belongs to the class of inexpensive cinema projection lenses made according to the aplanatic scheme. Among the 35KP and RO lenses, there were also aplanates, which introduces confusion in the designations. The main difference between anastigmata and aplanates with equal parameters is their mass: aplanates weigh much less. The low price and prevalence in the secondary market with very serious optical parameters makes projection optics popular with many amateur photographers, but their use requires adaptation efforts. Specifications [Yakovlev Handbook, v. Geometric parameters of the original lens unit body:. Projection aplanates are the most expensive and difficult to fully adapt projection lenses: the installation of an internal diaphragm in their housing is not possible, unlike most planar anastigmata. This is due to the large light diameter of the inner surfaces of the aplanate lenses. Thus, in order to obtain a projection aplanat with a diaphragm, it is necessary to manufacture a new housing for its optics.

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The Flora of the Sidewalk 21 by Shayne Legassie. Comments 0. Sharpness for mm and aperture 1. The best helper in this case is bracketing focusing. Almost entire Europe is caught on rainy weather. With this lens you can: Convey perspective in an unusual way - by sharpening the distance in the center of the frame and the foreground along the edge; Shoot portraits with a subject in the center - the background will blur along the edge much more than with a similar flat-lens lens; Shoot objects located at different distances from the photographer - with an open aperture, keeping a scanty depth of field! Very informative. Posted: Sat Feb 19, pm Post subject:. Are tonal gradients smooth or not? Download source files in format JPEG can at this link 32 files in the '. Such adaptation options, however, can be quite laborious due to the amount of locksmith work and inaccurate, since it is more difficult to maintain the alignment of the optical system and factory lens distances. There are no focusers, no apertures in the lens. I liked how he washes silhouettes of people, trees, for example. In this case, such a monocle will be so terrible that you simply cannot use it.

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Due to the presence of an extended empty space between the lenses, the KOM works mediocrely with light: despite blackening, it is difficult to overcome reflections. Add to cart. Nostalgia by petrapetruta. Among the 35KP and RO lenses, there were also aplanates, which introduces confusion in the designations. There are even three lenses in three hundred - they require a very precise fit, up to thousandths even. Specifications: Focal length Max. And this is how a self-made helicoid for KO looks like You will find more reviews from readers of Radozhiva here. Onotole I do not like to go into the optical-technical properties of glass, I either like the picture or not, naturally in skilled hands.