Originally posted by limestonecowboy Just had a daft idea, if you had a mirrorless K mount camera (such as the K-01 for example) - is there enough space to design a tray to fit filters where the mirror isn't?
Not so daft, in my view.
An important filter to have would be a neutral density filter. Such an optional filter is present in some cameras and could be added to DSLRs as well.
Beyond coping with situations that require shutter speeds in excess of 1/8000s, such a filter, if placed strategically, would help avoid the use of HSS in flash photography without causing the usual ND filter issues like requiring step up rings, making the viewfinder dark, and/or causing trouble with AF.
Actually, DSLRs would be advantaged regarding camera-internal optional ND filters. These would only affect the sensor but leave the viewfinder and the AF system unaffected. Mirrorless cameras would be impeded regarding the viewfinder (darker or noisier image) and AF (slower or failing acquisition). I wish Ricoh could make this difference count and demonstrate that there is merit to the idea of "Long live the DSLR!".