What is the depth of field?

On the closest distance focus it has about 1.5 centimetres of depth of field. The lens can focus as close as 4 centimetres of the lens.2.7 centimetres are aproximately 1 inchFocusing on an object 4 metres away, the depth of field is about 1.5 metres.1 metre is aproximately 39.5 inchesThese values are taken with the lens set on 2.8 mm.When set on 12mm, the values are lower. About 1 centimetre on close focus and 70 centimetres (27.5 inches) when focusing at a distance of 4 metres.Hope it helps

Is the varifocal adjustment manual or motorized?

Both the focus and focal length are manual adjustments. Each has a small finger screw you can loosen to adjust the lense and tighten once set.

What size filter does this lens use? it's threaded so it looks like it could take one. i purchased a 25mm ir filter and it was close but didn't fit

I purchased this for someone else, and don't know the answer to your question.

Will this need a program to run, or preview video

It uses Twain. Any standard program that uses a webcam can be used. I use VLC player.

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🎥 Zoom in on perfection — see every detail, miss nothing!

CRYSTAL CLEAR 1080 P HD - Experience sharp, professional-grade video at 1920x1080 resolution, perfect for detailed surveillance or streaming.
HIGH SPEED FRAME RATES - Capture smooth motion with up to 120fps at 640x480, ensuring no detail is missed in fast-paced environments.
FLEXIBLE VARIFOCAL ZOOM - Adjust your field of view seamlessly from 2.8mm wide-angle to 12mm telephoto, tailored to your unique setup.
CROSS PLATFORM COMPATIBILITY - Plug-and-play USB module works effortlessly with Android, Windows, Linux, and Mac OS for ultimate versatility.
EFFICIENT COMPRESSION OPTIONS - Choose between YUY2 and MJPEG formats to optimize video quality and bandwidth for your specific needs.

The ELP 2.8-12mm Varifocal Lens USB Camera delivers crisp 2.0MP Full HD video with a versatile varifocal lens adjustable from 2.8 to 12mm. Supporting up to 120fps at lower resolutions and compatible across major OS platforms, it’s the ideal camera module for professional-grade surveillance and multimedia applications.

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Package Dimensions L x W x H	11.3 x 7.1 x 5.9 centimetres
Package Weight	0.12 Kilograms
Brand	ELP
Has image stabilisation	No
Included components	Camera module USB, USB cable
Max Focal Length	12 Millimetres
Min Focal Length	2.8 Millimetres
Part number	ELP-USBFHD01M-FV
Water Resistance Level	Not Water Resistant
Zoom Type	Digital
Focus type	Manual Focus
Effective still resolution	2 MP
Guaranteed software updates until	unknown

ELP 2.8-12mm Varifocal Lens 2.0megapixel USB Camera,Camera Module USB for Android Windows Linux and Mac Os

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