JvdM
JvdM
Hi bogert
I have the Dandelion (from tagotech) and tried using it with the telescope. I have found it more bother than help. It will spuriously lose the programmed info and when using a 1.4x TC you don't have focus confirm (on Canon) anyway. It does help to sort photos when you change or stack TC's during a shoot, as it records the f/ number in the exif data - with my 1.4x Kenko's as either f/8 or f/11.
In the case 3dreal mentions (400mm f/5.6) it may work as long as you don't add a TC to the lens/camera combination as AF is limited to f/5.6 on Canon consumer DSLR's. Canon DSLR's don't provide for trap focus in the software, so if it is your thing this may work with a lens, but not with a telescope where you are already at f/7 or smaller. I have tried to fool the AF by programming the chip to 600mm f/4, but the AF refuses to work when it senses the light value to be below the value it would have at f/5.6.
Some of the other guys may have had better results with different cameras or different chips, but the lack of excitement here leads me to think otherwise.
Best regards
Jaco
I have the Dandelion (from tagotech) and tried using it with the telescope. I have found it more bother than help. It will spuriously lose the programmed info and when using a 1.4x TC you don't have focus confirm (on Canon) anyway. It does help to sort photos when you change or stack TC's during a shoot, as it records the f/ number in the exif data - with my 1.4x Kenko's as either f/8 or f/11.
In the case 3dreal mentions (400mm f/5.6) it may work as long as you don't add a TC to the lens/camera combination as AF is limited to f/5.6 on Canon consumer DSLR's. Canon DSLR's don't provide for trap focus in the software, so if it is your thing this may work with a lens, but not with a telescope where you are already at f/7 or smaller. I have tried to fool the AF by programming the chip to 600mm f/4, but the AF refuses to work when it senses the light value to be below the value it would have at f/5.6.
Some of the other guys may have had better results with different cameras or different chips, but the lack of excitement here leads me to think otherwise.
Best regards
Jaco