Mamiya 645 Pro TL - Blinking shutter speed with AF

Hi All,

Quick question regarding the Mamiya 645 Pro TL. I noticed that when I have the manual crank winder installed, the shutter speed as well as metering mode LEDs in the AE prism are blinking. If I swap out the manual crank winder for the power grip winder, the LEDs stay solid. I tried switching out various backs as well as dark slides and neither made a difference. Can someone tell why the shutter and metering LEDs are blinking? Is something wrong? Also I am using the camera in AEL mode.

According to this link from B&H, they blink when the correct exposure is met. That info is under the "Specifications" tab after "Exposure Metering"

http://www.bhphotovideo.com/c/product/800848108-USE/Mamiya_645_Pro_Medium_Format.html

Thanks for your help.

**Edit: Sorry, I have no idea why I put AF in the post title...I think I meant to write AE prism.

Will the owners manual help?

http://www.cameramanuals.org/mamiya_pdf/mamiya_645_pro_tl-1.pdf
http://www.cameramanuals.org/mamiya_pdf/mamiya_645_pro_tl-2.pdf

http://www.butkus.org/chinon/mamiya/mamiya_645_ae_finder/mamiya_645_ae_finder.htm
http://www.cameramanuals.org/mamiya_pdf/mamiya_645_ae_prism_finder.pdf

Thanks Marc,

Unfortunately I've looked through those already and haven't been able to find anything in relation to why the shutter speed/metering would blink when using the crank winder versus the power grip winder.

On my AE Prism N, when the camera is set to manual exposure, the recommended exposure speed flashes, while the manually set speed is steady.

(Or is it the other way around?:confused

And the LEDs blink when the dark slide is inserted.

So I guess I should be more specific when I referred to the LEDs. The only parts that are blinking are the shutter speed and metering settings. Theres no other LEDS blinking in viewfinder. Also this is when shooting in AEL mode. I haven't tried manual. The settings blink independent of the dark slide location.