marcolisi 0 Posted June 29, 2011 Hi guys, I got this cctv camera: EXELON GHN-A955 700 TVL Color Box Camera with 3D DNR, ICR, SENS-UP, DUAL power [edit by mod-store link removed] and I am wondering if I should buy this expensive lens for it Pentax C70403PS 1/3" CS Mount 4mm F2.0 Pinhole Lens with Auto Iris DC [edit by mod-store link removed] My goal is to achieve as good as possible low light videos with the setting pinhole lens + camera. I know that the camera should achieve these low lux capability: Min. Illumination 0.1Lux@F1.2 (Color mode) / 0.0003Lux (Sense up) the problem is that the pinhole lens I pointed u to buy is a F2.0 lens How much would I lose in lux using the F2.0 lens ? There are F1.0 pinhole lenses, but they are NOT auto iris...I need an auto iris lens so that I can get videos under every light conditions. Any suggestion please ? Also the lens above is CS, many other cameras are C compatible. Would be a problem later on to use the lens above that is a cs mount to c mount cctv cameras ? I know there are CS to C adapters, but will they giving vignetting on 1/3" sensors ? I think the lens above is good for 1/3" sensors only... Thank you so much cctvguy is offline Reply With Quote Share this post Link to post Share on other sites
rory 0 Posted June 29, 2011 Please dont post links to online stores, thanks. Share this post Link to post Share on other sites
marcolisi 0 Posted June 29, 2011 Please dont post links to online stores, thanks. so, how do I show u the items I am talking about ? Can I post the general google search ? or can u guys be of any help without the need of the links ? tx Share this post Link to post Share on other sites
HTElectrical 0 Posted June 29, 2011 You can post the link from the manufacturer, or from one of the supporting vendors listed on the left, or copy and paste the specs or...... Share this post Link to post Share on other sites
marcolisi 0 Posted June 29, 2011 Camera specs : Image Sensor 1/3" Super HAD II CCD Total Pixels 811(H) x 508(V) Effective Pixels 768(H) x 494(V) Scanning System 2 : 1 Interlace 525 Lines / 60 Fields / 30 Frames Synchronization Internal / Line Lock Scanning Frequency Horizontal : 15,734KHz / Vertical : 59.94Hz Horizontal Resolution 700TV Lines (Color) / 750 TV Lines (B/W) Min. Illumination 0.1Lux@F1.2 (Color mode) / 0.0003Lux (Sense up) S / N Ratio (Y signal) 52dB (AGC off, Weight on) Video Output 1.0Vp-p / 75 Ω (Video 0.714Vp-p, Sync 0.286Vp-p) OPERATION OSD Multi-language support Camera Title On / Off Day & Night True D/N ; Auto / Color / BW / Ext ICR (IR Cut Filter Removable) Yes WDR (Wide Dynamic Range) Low Frame; On / Off / Auto (WDR Lever, Weight) Digital Zoom On / Off selectable (1.0X ~ 10X) Back Light Compensation BLC, LWDR, HLC(ON/OFF) Gain Control Low / High / Off White Balance ATW(2,500K ~ 9,500 K)/MANUAL/AWC Electronic Shutter Speed Auto / Normal (1/60 - 1/100,000) / Flickerless Sense-up (Frame Integration) On / Off (2X ~ 256X) RS-485 interface PELCO-D, PELCO-P protocol support Super DNR 3D-DNR Low / Middle / High / Off selectable Digital Image Stabilizer (DIS) On / Off Motion Detection On / Off(240 Block) Privacy Masking On / Off (8 Zones) Mirror / Flip Reverse Sharpness On / Off selectable (Level Adjustable) ENVIRONMENTAL Operating Temperature -20 C ~ +60 C Operating Humidity 10% ~ 80% RH MECHANICAL Ingress Protection N/A Dimensions 1.96(W) x 2.24(H) x 3.54(D) inch Weight 0.66 lb ELECTRICAL Power Source 24V AC / 12V DC (10%) Power Consumption Max. 150mA (at 12V DC) Pinhole Lens specs The Pentax C70403PS is a 4mm pinhole lens for use with 1/3" CCTV cameras in security and machine vision imaging applications. It incorporates advanced optical elements to ensure excellent image sharpness and superb light conductivity. It is also equipped with an auto iris function so that it can be used in areas with changing amounts of light. Its durable design also means that users will get long-term dependable performance in a variety of industrial operating environments. Imager Size 1/3" Mount Type CS Focal Length 4mm Aperture F2.0 Iris Operation Auto Iris DC Focus Operation Manual Horizontal Field-of-View 1/4": 51.24 1/3": 68.47 Minimum Object Distance (M.O.D.) 30cm Filter Size N/A Dimensions (WxHxD) 1.5 x 1.7 x 2.6" (37 x 42 x 66mm) Weight 2.8 oz (79 g) --------------------------------- Hopefully now, after all these bureaucratic problems, someone would be able to help. Any help is really appreciate. Thank you Share this post Link to post Share on other sites
