alexandros petin

Hello, in this post i believe mr Wyss sums the options for c mount cine lenses. You will find more if you search the forum. These options are not found for cheap unfortunately, and like you mention it is often that they are abused. I would also look at sample images and videos of Tevidon lenses. The were made from Zeiss Jena for early CCTV cameras. I have not used them myself with my bolex, but you can find online many still image samples shot with m43 cameras, but also lots of videos shot with black magic pocket camera OG. Imho the quality is really nice and their price ok. One thing i am trying to verify is if these lenses can be mounted to bolex c mount, or they cant because of their large size (circumference), that could interfere with the central silver part of the bolex turret.

If you want to keep it low budget check out the bolex Cine Assist Animo One aniMo one motor (kinda weird name) that i think it doesn't break the bank. I am not affiliated in any way, I am just also considering to buy it. Not a sync motor but along the many nice features it has, if you contact filmcurl you ll get details of a surprisingly steady motor for the price. http://cineassist.filmcurl.com/ i think the creator is a member of the forum.

Hello Don, for the RX primes set according to this document page 12 "Two automatic depth-of-field scales meet either normal or critical requirements. " so green area is critical, yellow normal and red out of acceptable focus. The above document, as stated in pacificrimcamera.com, is undated but probably from the late 60s (1968). The 1955 document does not mention any DoF indicator, and also there is one image with silver schneider lenses only. The 1963 document is more specific in page Sixteen "Two ranges of depth are provided : Red field for normal use and a yellow field for most exacting demands (circle of confusion of 1/1OOOth. of the diagonal.)" All these make me think that lenses with only red indicator are late 50s-early 60s versions, that got not long after updated with T marks and normal-critical requirement DoF indicators.

Back with another observation i totally missed. As shown in the image of the first post, the lenses that have only red indication do not have the green T True Stop markings etched on the barrel like the one in this post. After realizing this, a quick google search confirms that lenses with T values etched on the barrel have the red yellow green Dof indication, while the ones without Ts only red. In conclusion, it seems there is nothing wrong with the lenses, but there are at least two versions of Schneider RX lenses with T values and tri-color Dof indication as main differences.

On a side note and off topic, i joined this forum back in 2007 and was enjoying it more regularly until 2011. Then i had occasional visits, until this recent post of mine, since when i refreshed reading through posts some things film related, caught up with nice topics that i had missed etc. A lot has changed since 2011, but as i am member of relevant facebook groups too, i wonder if facebook has "killed" the forums. In facebook posts receive lots of answers and reactions, similar to how i remember this forum. Problem is forums compared to facebook are designed to cultivate discussion, store information and knowledge in an organized fashion with subforums, while facebook imo promotes immediacy of interaction regardless the topic at hand, but the information is not in anyway classified [besides the group, albeit too general, name, for example Super 8mm] and/or retrieved easily.

For future reference and for others having the same issue. To my understanding, without dismantling the lens, it seems that when i open/close the diaphragm of the lens with all colors, colored lamelas slide up and down along the lens length to color the Dof indication opening according to the DoF. The lenses with only red color have the same mechanism principle but in place of green and yellow only silver parts slide. This makes me think that either somehow the green and yellow colors faded, or the silver parts should "catch" hidden colored ones and make them slide into place, but they are not. Anyway these are scheduled for service, but wanted to know beforehand what is wrong, if they can be fixed. I will update this topic once i know more.

I think according to this pdf the silver one is a Vidicon Type A lens (see page 17 top left image).

Hello, i was using my bolex REX 4 mainly with the 18-86 OE zoom. Now i want to use my schneider primes and i noticed that not all of my lenses have the auto depth of field with 3 colors red-yellow-green. As you can see in the photo only red, no green and/or yellow. I looked online for images of the RX lens set and each has this feature, so unless there was a version sold with only red markings, something's wrong with these lenses. Any ideas?

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attaching iscoramas the cameras lens is set to infinity and you only focus the anamorphic. the downside the cost $$$$$

one hour and half remaining

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Hello i use two large paper developing trays filled with water and two aquarium heaters heating each at the 38C temperature. one tray heats the chemicals the other the lomo tank. thats the best method i have found so far to keep good temperature during the process. i also consider emptying the tank is included in developing time but i am not sure if this is right.

The second frame grab is really nice!!

image hosting service image host from the bolex manual