Camera modification for astro imaging Updated on:  04 Mar 2023


Original internal low pass filter (LPF) blocks about 75% of H-Alpha light, and so this filter needs to be removed such that more H-Alpha light can be captured.


Types of modification:

Astro imaging ... Remove LPF and replace with Baader ACF/BCF (APS-C/FF) or Astronomik L-3 (FF) filter, keeping or removing front dust cleaning filter (if any). BCF/L-3 filter for blocking UV/IR, but not H-alpha.

Full spetrum ... Remove LPF / dust cleaning filter. If needed, install Astronomik clear filter (FF only) to minimize infinity focusing issues while using camera lens. 


Baader ACF/BCF filters (same as L filter)


ACF I filter, #2459211, for Canon 300D ... HK$590 (in stock 現貨)

ACF II filter, #2459212, for Canon 350D, 10D, 20D, 30D ... HK$660 (accepting order 接受订货)

ACF III filter, #2459214, for Canon 5D ... HK$620 (in stock 現貨)

BCF filter, #2459213, for all APS-C cameras ... HK$550 (in stock 現貨)

BCF2 filter, #2459214A, for all full frame cameras  ... HK$620 (in stock 現貨, while stock last)



Astronomik L-3 filter (1mm thick) for all full frame cameras  ... HK$990 (in stock 現貨)

Astronomik Clear filter (1mm thick) for all full frame cameras  ... HK$660 (in stock 現貨)


Service charge for LPF removal or replacement (filter cost not included):

APS-C camera ... HK$580

Full frame camera ... HK$680


Camera modification for Infra-red imaging

Remove all filters in front of CMOS, then install one of the below infra-red pass internal filter (filter cost not included):

* Standard infrared (720nm)

* Enhanced infrared (665nm)

* Super color infrared (590nm)

* Super blue infrared

* Deep black & white infrared (830nm)

** Click here for infra-red photo details


** Please ask if you need more details