When the EOS-1v is used with either the PDB-E1 or PB-E2 loaded with eight AA-size alkaline or lithium batteries, the AF responsiveness in tracking moving subjects via AI Servo AF mode is the same even though the Ni-MH Pack NP-E2 is not available. What you lack in this set-up is the 9 fps firing rate but the 5 fps option with the PDB-E1 or PB-E2 with AA batteries is more than enough for a catwalk fashion show as these four photos below have shown: Shot at 1/125 sec. at f/2.8 (135mm) Shot at 1/125 sec. at f/2.8 (135mm     Shot at 1/60 sec. at f/2.8 (200mm) Shot at 1/100 sec. at f/2.8 (100mm) Since I had gotten used to PB-E2 with the EOS-1v prior to this catwalk session, it was a bit awkward whenever I tried to alter the shutter speed vertically, only to realize that I was no longer using the PB-E2 but the PDB-E1 instead, which did not feature a vertically positioned Main Dial and AF Selection button. Using Speedlite 540EZ and 3-zone TTL Flash metering Users of the EOS-1N/1N RS will not set their cameras on Program AE with the Speedlite 540EZ in A-TTL mode. The algorithm of the EOS-1N/540EZ in A-TTL mode means it will set smaller apertures at the expense of darker backgrounds amidst correct exposures for the main subject. With the 540EZ fitted to the EOS-1v in Program AE (A-TTL) mode, it was a surprise that this combination did not go the usual route as with the EOS-1N/1N RS cameras. In fact, background exposure with the EOS-1v/540EZ via A-TTL Program AE mode is almost similar to an exposure made with E-TTL on a 550EX (see photo of the dancers below). However, this combo was not able to retain the ambient light atmosphere like a 550EX would. Models performing Siamese dance Shot in TTL Tv mode     Shot in TTL M mode Shot in TTL Av mode (f/2.8 at 1/15 sec) Using the EOS-1v with the Speedlite 540EZ in Tv, Manual and Av modes showed a different atmosphere altogether from those shot in Program A-TTL Flash. With the 540EZ set in TTL flash, the EOS-1v has again reverted to the 3-zone flash metering mode - automatically selected whenever TTL flash is being used. As can be seen from the next three photos above, the overall illuminations in them suggest no serious limitations in using the EOS-1v with an EZ-series Speedlite, in this case the 540EZ. On the next page, I will show a few more examples of how the EOS-1v was used in the Tv mode (my favorite) with the Speedlite 540EZ via TTL flash. There is also another example shot in Manual with the 540EZ in TTL mode. << Back to Main . 1 . 2 . 3 . 4 . 5 . 6 . 7 .