I unfortunately do not have opportunities to visit centers where I can test-drive Tech Cameras - Thus my question is based on the lack of hands on experience - -
1. How sturdy is the alignment for Sliding Adapters ?
2. Compared to fixed systems such as Alpa, how good is the tolerance ?
3. As I live in a very dusty environment, sealing the DB as much as possible is critical - Thus when the DB is slid away from the picture capturing position, is the ccd exposed in a way that dust can enter/attach itself to the sensor ?
I ask these sets of questions I as prefer accurate compositions and using the external viewfinders does introduce parallax errors, specially when shooting close up.
In addition, unlike DSLR type viewfinders, external viewfinders do not provide a sense of the dof.
Live view would be great, but I believe it generates heat leading to image artifacts/noise and excess power.battery drainage !
Using a Sliding Adapter would mitigate these issues, but may bring on its unique limitations
Will value your inputs on how best to address the above, possible options and some of the approaches adopted by the many users.