SL1250A SL1250M SL1250P 4k Telephoto Lens Theia
Ultra high resolution, telephoto lens
12-50 mm focal range
True 4K, 12 megapixel resolution
IR corrected for Day/Night
For 1/1.7" sensor sizes or smaller
Compact design to fit into domes as small as 4” mini-dome size
Overview SL1250A SL1250M SL1250P
Iris type DC autoiris Manual Iris P-iris
IR cut filter No No No
Motorized focus/zoom No No No
Focus/zoom limit indicator No No No
Focal length 12mm - 50mm 12mm - 50mm 12mm - 50mm
F/# F/1.8 to closed F/1.8 to closed F/1.8 to closed
Resolution True 4K resolution, 12 megapixels True 4K resolution, 12 megapixels True 4K resolution, 12 megapixels
Mount type CS-mount CS-mount CS-mount
Theia's SL1250 lens is designed to be very compact and better image performance compared to competitive products.  Despite the long focal telephoto focal length, this lens is designed for small 4" dome cameras and bullet cameras.  
Similar to Theia's other lenses, the SL1250 series is a high quality lens designed to allow the installer to take full advantage of the high resolution of 4K resolution, HD, and multi megapixel cameras.  The lens can be used on cameras up to 12 megapixel resolution giving a crisp image from edge to edge. 
The motorized version of the lens is the TL1250.
SL1250A
12-50mm, 4k 12mpx, Day/Night, DC auto iris, 1/1.7" format CS mount telephoto lens
SL1250M
12-50mm, 4k 12mpx, Day/Night, Manual iris, 1/1.7" format CS mount telephoto lens
SL1250P
12-50mm, 4k 12mpx, Day/Night, P-iris, 1/1.7" format, CS mount telephoto lens
Accessories
FMT-3555
Filter Mount Accessory
This filter mount can be added to the various Theia lenses to allow an external filter (such as band-pass or polarizing filter) to be added to the system. The filter mount works with lenses with 35mm front barrel diameter and is held in place with 3 sharp point set screws. It will accept filters with M55x0.75 threads. Filters are not provided by Theia Technologies.
Part FMT-3555: High performance aluminum filter mount for use with lenses:
SL410, TL410, ML410 ML610
SL1250, TL1250 *MY23F
SY110, MY110
*special care required when installing filters to prevent damage to the motors
View FMT-3555 CAD Data
KIT-9050
Part KIT-9050 Thumbscrew replacement kit for:
SL1250M
The kit includes 2x M2x5 set screws, 2x M2x7 set screws, 2x M2x5 button head screw and Allen keys.