Hutech-enhanced Sony cameras are offered in two filter options:

• Option T - Astronomical bandpass filter for use with refractive optics focused only for the visible spectrum (typically for amateur astronomers), with red bandpass sensitivity extended to 700nm to fully capture H-alpha. Sony self-cleaning function retained.
• Option E - Sony filter removed without an installed replacement to achieve the widest possible bandpass and minimal internal reflections for specialty imaging. Sony self-cleaning function not available.

Filter Option:	Performance-enhanced
	Option T	Option E
Number of filters	One	None
Auto-Focus	Yes	Yes
Self-cleaning	Yes	No
UV/IR blocking for astronomy	Yes	No Requires extra filter
UV/IR capability	No	Yes
Anti-reflection	Good	Best
Standard photography	Yes, with custom white balance (CWB)	No Requires daylight filter
Hα transmission	Max	Max
Remarks	Sony UV/IR blocking filter	Least internal reflection (virtually none) UV/IR capability without self-cleaning function

* Note: The lens mount for the modified camera is not set at the same imaging plane distance as a stock camera. Some E-mount lenses may not reach infinity focus.