Search found 78 matches

by cameratech
Wed Dec 17, 2014 9:14 am
Forum: Small gauge film forum
Topic: Beaulieu R16 battery voltage
Replies: 15
Views: 4325

Re: Beaulieu R16 battery voltage

The old battery pack might have been 8.4V with a centre tap of 4.2V, hence labelled + and - 4.2V. A small amount of over-voltage is usually OK, a fully charged battery will measure 10% to 15% over the nominal voltage, so appliances need to be capable of working off a voltage range. If the old batter...
by cameratech
Wed Dec 17, 2014 7:41 am
Forum: Small gauge film forum
Topic: What do you call the paste between some lens elements?
Replies: 8
Views: 2117

Re: What do you call the paste between some lens elements?

Canada Balsam hasn't been used to bond lens elements for many decades. These days manufacturers generally use UV cured optical cement, but there are a number of different products available. See: http://www.optical-cement.com/cements/products.html#anchor720308 A cheaper option is to just use a consu...
by cameratech
Thu Jul 24, 2014 5:09 am
Forum: Small gauge film forum
Topic: Cheap D8 Cameras to use on Workshops
Replies: 8
Views: 2450

Re: Cheap D8 Cameras to use on Workshops

Gianni's collection would be great to use! Otherwise, after a quick check on Uk eBay there's a few cheapish options: Minolta Minoltina for £12.50 which is like the Canonet, spools fit into a custom cartridge for easy turning. Sankyo 8-CM for £15 Best bargain would be a Bolex K2 for £10, but...
by cameratech
Thu Jul 17, 2014 12:07 pm
Forum: Small gauge film forum
Topic: Share your Collection/Tools of Choice
Replies: 39
Views: 17471

Re: Share your Collection/Tools of Choice

Hi grot, Cine-Kodak was the name Kodak gave to virtually all their movie cameras, starting with their first one, which was also the first 16mm camera, later named the Cine-Kodak Model A. That came out in 1923, along with 16mm film. Later on there were Cine-Kodak Models B, BB, E, K, M, Cine-Kodak Spe...
by cameratech
Sun Jul 13, 2014 12:47 pm
Forum: Small gauge film forum
Topic: Bolex D8l rubber roller question
Replies: 5
Views: 1843

Re: Bolex D8l rubber roller question

It should turn clockwise but not anti-clockwise, ie it shouldn't turn as film passes over it but act as a break.
by cameratech
Sun Jul 13, 2014 12:34 pm
Forum: Small gauge film forum
Topic: Regular 8mm or Super 8?
Replies: 15
Views: 4640

Re: Regular 8mm or Super 8?

I'm pretty sure that on Bolex Pocket cameras like the B8 the take-up spindle has a single spring leaf that needs to lock into one of the spool slots, so it doesn't matter about the 3 or 4 spline thing. (At least that's how my D8 is, I don't have a B8 here to check but I don't recall them being diffe...
by cameratech
Sat Jun 28, 2014 12:58 pm
Forum: Small gauge film forum
Topic: noob film anamorphic question
Replies: 11
Views: 2744

Re: noob film anamorphic question

I don't think a macro lens will work better, anamorphic projection lenses normally won't focus closer than 5 feet anyway. For closer focus you need to use a diopter in front.
by cameratech
Sat Jun 28, 2014 12:50 pm
Forum: Small gauge film forum
Topic: noob film anamorphic question
Replies: 11
Views: 2744

Re: noob film anamorphic question

Hi Miles, yep pretty much what you said for focussing. You need to focus both, so setting the anamorphic to roughly the distance then fine focussing with the prime (or zoom) is the way to go. Most of those anamorphic projection lenses lose about 1/3 stop, which is pretty much what you found going fr...
by cameratech
Thu Feb 27, 2014 2:13 pm
Forum: Small gauge film forum
Topic: Can someone give me a little lesson about Lens Blooming?...
Replies: 2
Views: 1785

Re: Can someone give me a little lesson about Lens Blooming?

Blooming is a type of tarnishing that occurs on certain glass types and has the interesting effect of increasing the transmission of light - on lenses this creates a brighter, higher contrast image. It was noticed in the 19th century that some older telescopes seemed brighter than newer ones, but no...
by cameratech
Mon Jan 06, 2014 3:47 am
Forum: Small gauge film forum
Topic: Zeiss Ikon Moviflex Super
Replies: 8
Views: 3823

Re: Zeiss Ikon Moviflex Super

Hi Joel, the L position is for normal running, E is for single frame. The 2,4,8 numbers adjust the lightmeter and thus the automatic iris by one stop each increment, presumably for lens filter compensation (since the meter is not through-the-lens but beneath it). So for example setting it to "8" wou...
by cameratech
Fri Sep 06, 2013 10:53 am
Forum: Small gauge film forum
Topic: Field of View / Focal Lengths Table
Replies: 6
Views: 1943

Re: Field of View / Focal Lengths Table

..the focal length number has no other real purpose than providing for determination of field of view (ie. for any film/sensor formats). In other words there isn't much else you do with such a number. On the contrary, there are many reasons why you need to know the focal length of a lens, beyond de...
by cameratech
Thu Sep 05, 2013 10:39 am
Forum: Small gauge film forum
Topic: Beaulieu MR8 Questions
Replies: 5
Views: 1881

Re: Beaulieu MR8 Questions

I did come up with one more question. The reflex control section of the manual says to use a shutter speed of 1/65 at 18fps, that seems fast. Is this due to light loss with the reflex viewfinder? Unless I'm misunderstanding how the reflex system works I wouldn't think there would be any light loss....
by cameratech
Thu Sep 05, 2013 4:50 am
Forum: Small gauge film forum
Topic: Beaulieu MR8 Questions
Replies: 5
Views: 1881

Re: Beaulieu MR8 Questions

I've got 3 of these cameras but none of them have the socket to the right of the run button like yours. The position would seem to place it leading straight in to the mirror and claw drive gear in the film chamber side, maybe its a modification to give a synch pulse to an external sound recorder? It...
by cameratech
Tue Sep 03, 2013 5:29 pm
Forum: Small gauge film forum
Topic: Field of View / Focal Lengths Table
Replies: 6
Views: 1943

Re: Field of View / Focal Lengths Table

There are a number of field of view calculators and comparators online, for example: http://www.abelcine.com/fov/ http://www.panavision.co.uk/services/image-calculator.asp or cinematography phone apps which do all that and more: http://www.theblackandblue.com/2010/03/22/toolkit-useful-iphone-apps-to...
by cameratech
Sat Aug 10, 2013 5:15 pm
Forum: Small gauge film forum
Topic: Is the super duper 8 or max 8 a scam?
Replies: 36
Views: 6963

Re: Is the super duper 8 or max 8 a scam?

I'd have to agree Jean-Louis!