NIGHTSEA Focus Lens for SFA Light Head, 30mm

The focus lens is an add-on for the SFA light heads to produce a higher illumination intensity!

This is a simple adapter that slips over the front of your existing NIGHTSEA SFA light head and grips with a friction fit. It is available with two options for the focal distance: 30mm or 50mm. 
No lens – illumination spot approximately 15mm diameter with the light head positioned 50mm from the surface. 

50mm lens – central spot approximately 5mm diameter, intensity increase ~2x. 
30mm lens – central spot approximately 2mm diameter, intensity increase ~3.5x. 

The images below show the focus lens add-on and the effect. The three illumination spot images were made in manual exposure mode and are indicative of the relative intensity.

MiniQGD_app_ferritin1.jpg

No Focus Lens
50mm Focus Lens
30mm Focus Lens
 

Considerations for lens choice:

To gain the benefit of the 30mm lens it is necessary to position the light head very close to the subject. This may be challenging in the tight space beneath a microscope objective. It might be more suited for photoactivation, where a high light intensity dose in a small area is often needed. 
The 50mm lens provides a trade-off – brighter fluorescence, easier to work with. 
Note – If the light head has a snoot installed that will have to be removed to use the focus add-on.

SKU: SFA-FL-30
Pack: Each
$95.00
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