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Midwest Optical Filters

Blue Bandpass Filter, 25.5 mm Thread

Price: $105.00 each

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Passes only blue light to the camera
Blocks ambient light and improves contrast

This bandpass filter blocks all light wavelengths except blue. It is ideal for blocking ambient lighting and improving contrast when combined with blue (470 nm) LED lights. It is also a necessary component for many UV-excited blue fluorescence (430-500nm) imaging applications.

This mounted filter screws in to the threads on the front of a matching lens. The filter coating is durable and non-hydroscopic. It withstands cleaning, heat, humidity and vibration.

Mounted filters screw into the threads on the front of a matching lens. Configure to select the appropriate thread. Unmounted filters and slip-mount filters are available on request.


Thread: M25.5 x .5
Aperture: 21.0 mm
Mount Material: Black anodized aluminum
Clear Aperture: 2.65 to 5.90 mm smaller than the thread size, depending on size
Outside Diameter: 1.15 to 4.8 mm greater than the thread size (with exception of C-mount thread which threads into camera neck)


Filter Type: Color Bandpass
Wavelength: 470 nm
Surface Quality: 40/20 Scratch/Dig

The manufacturer warrants all components against defects in materials and workmanship for 24-months from the date of factory shipment. Liability under this warranty is limited solely to the Manufacturer’s option of replacing, repairing or issuing credit in the amount of the purchase price of such product.

Small quantities of filters we normally stock may be returned within 30 days of purchase, if in factory new condition and in their original packaging. A 30% restocking fee will apply. Special orders may not be cancelled, nor returned.

All returns must be pre-authorized by Machine Vision Store and shipped with freight pre-paid. Please contact us to request authorization and instructions. The item's serial number and associated sales order number will be needed.