C mount adaptors for E700 spotter builds Clearance prices

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some bloke
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C mount adaptors for E700 spotter builds Clearance prices

Post by some bloke » 18 Dec 2014, 17:59

'C' mount/E700 spotter DIY build adaptors: The clearance price of the remaining one's are £10 each. Add £7 RMSD regardless of how many you order at one time.

To get the best from a spotter it helps to compare the glass len diameters of the type of lens you will use. CCTV zoom lenses generally have 11mm diameter rear glass elements. 'C' mount lenses that are better for our purposes generally have 16mm diameter rear glass elements.

The bonus with this type of adaptor is massive because the whole of the wider (16mm) C mount rear glass lens sees the whole of the CCD sensor edges through a 16mm hole rather than the cheaper ebay types that screw into the M12 threaded camera neck with a narrow 10.5 mm hole through them that is designed to nearly match up with the small (11mm) rear glass element of the zoom type CCTV lens. The Ebay one therefore obstructs some of the edge detail and light that exits a 'C' mount lens on the way to the camera sensor.

My 'C' mount lens/E700 adaptors also have four substantial M4 threaded fixing holes to aid fixing both the lens and camera to your panel. :angel:

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They are designed to reliably and robustly fix a C mount lens to a panel or box, then use the 16mm diameter neck of any metal cased camera to accurately centre and glue it into the rear of it using silicone bathroom sealant on the metal case. Note the camera body, being inside a protective box is not subject to the occasional handling knocks that the external lens would get, and the sealant sticks like shit to a blanket. 8-)

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Notice the O-ring around the neck of the adaptors?

Now look close to see the gap between the top of the adaptor and the box of my mag mount spotter is wider than at the bottom, and the lens is angled slightly lower than the torch? The O-ring allows the adaptor to be tilted by adjusting the tension of the fixing screws so the camera and lens views slightly lower than what a fixed torch is centered at. We/you don't need much light in the foreground and getting the light beam higher in the monitor allows the beam to light up the distance better, partly because the foreground brightness would otherwise be shuttered out by the camera, which would then shutter out the distance too. You can avoid that by aiming the torch high - or the camera and lens low.

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Notice the different E700 camera lens lengths and the length of the neck they screw into. A 16mm lens neck needs to be cropped back because C mount lens flange focal length has to get closer than the standard neck length would allow. An E700 with a 12mm lens neck doesn't need to be trimmed back because its shorter, allowing the C mount lens barrel to retract close enough to acheive infinity focus.

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You will need to fit the adaptor into a 20mm hole in your panel or box. (Some of my remaining adaptors only have two fixing holes), then drill through its 4mm threaded fixing holes, using as hole guides with a 3mm drill bit, then remove the adaptor and drill out the 3mm holes in your box to 4 mm - or 5mm to allow a little latitude.

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What the inside looks like before the 16mm camrea neck is guided in and glued with silicone sealant - but can be removed with a decisive twist.

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Note that CS mount cameras have a shorter back focal length than C mount cameras despite having the same thread. These adaptors are not designed to be used with CS mount lenses as they will not allow the lens to get 5mm closer to the CCD sensor at the inner end of the neck. Also note they are only designed to mount metal bodied cameras that have a 16mm outer diameter lens neck.
Last edited by some bloke on 05 Nov 2018, 14:13, edited 19 times in total.
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jeffo
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Re: C mount/E700 adaptors for spotter builds

Post by jeffo » 18 Dec 2014, 18:27

are these the same as the ones on the other thread as the others look as if there is a flat bit to put a weaver rail ,or were those the m42 slr ones

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some bloke
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Re: C mount/E700 adaptors for spotter builds

Post by some bloke » 19 Dec 2014, 04:04

jeffo wrote:are these the same as the one's on the other thread as the others look as if there is a flat bit to put a weaver rail ,or were those the m42 slr ones
Correct - the M42 has a much longer focal length that will allow a short length of rail on the flat.
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jeffo
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Re: C mount/E700 adaptors for spotter builds

Post by jeffo » 24 Dec 2014, 15:08

can you tell me the outer dia thankyou

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sunndog
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Re: C mount/E700 adaptors for spotter builds

Post by sunndog » 24 Dec 2014, 15:24

Tidy little doodad that dave :thumbup:
when asking for advice, please include what n.v device and/or illumination you already have (if any) and what rifles you intend to use them on...cheers

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some bloke
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Re: C mount/E700 adaptors for spotter builds

Post by some bloke » 24 Dec 2014, 16:52

Adam - cheers. :thumbup:

Jeffo - 40mm: but it looks like my vernier might only be 'very near' :

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some bloke
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Re: C mount/E700 adaptors for spotter builds

Post by some bloke » 12 Jan 2015, 18:55

Original post edited with this update:

Notice the E700 neck has now been cropped back because the box camera is designed for board camera lenses and is too long for C mount lens focal lengths - and it will foul the lens seating depth.
The bonus is massive because the whole of the C mount rear glass lens now sees the whole of the CCD sensor:
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bogwelly
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Re: C mount/E700 adaptors for spotter builds

Post by bogwelly » 13 Jan 2015, 21:06

would this allow the lens to be screwed direct into the adapter or does it need a spacer between

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some bloke
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Re: C mount/E700 adaptors for spotter builds

Post by some bloke » 14 Jan 2015, 03:34

bogwelly wrote:would this allow the lens to be screwed direct into the adapter or does it need a spacer between
You fit C mount cine/TV /photography lenses straight to the adaptor. They are not suitable for the long zoomable so called C mount lenses which are in fact mostly CS mount lenses even if they are marked up as C mount.

These are the sort of 'C' mount lenses they suit, first one suits general purpose fox and rabbit ranges:

http://www.ebay.co.uk/itm/181226291236

This one for mostly rabbit ranges.

http://www.ebay.co.uk/itm/111176894452

This one for mostly ratting.

http://www.ebay.co.uk/itm/151890645446
Last edited by some bloke on 26 Nov 2015, 23:10, edited 1 time in total.
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bogwelly
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Re: C mount/E700 adaptors for spotter builds

Post by bogwelly » 14 Jan 2015, 11:33

pm sent

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