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Posted by Jason on February 09, 2002 at 21:48:31:
A begining sports photographer has a few questions. What is a dedicated SB-25, a quantum battery, and what does it mean to knock the flash down one stop. Also, I am shooting a lot of high school hoops, with a pentax pz-1p (250 sync) and a pentax 80-200 f2.8-but the light only allows a shutter speed of about 180, to slow to stop peak action and with large flash (250 sync) good results but major red eye-any help-Jason
Posted by JohnS on February 10, 2002 at 02:44:17:
Try Fuji 1600 film without the flash, on a test roll--there are comments about it in the film tests in the latest Popular Photography magazine. That may allow you to shot at 250 w/o the flash--worth a one roll try, maybe?
Posted by Jason on February 10, 2002 at 07:26:29:
Thanks for the response on film-but can someone help me with the other q's. What is a dedicated SB-25, what is a quantum battery, and what does it mean to knock the flash down one stop. One more thing-is it neccessary to purchase a light meter for sports photography, doesnt the camera itself provide much of the same information? Last, what are converters and how do they work-David Harris if your still connected you helped with a lot of info on sports stuff last year.
Posted by JRP on February 10, 2002 at 16:21:54:
The SB-25 dedicated flash is a Nikon Speedlight model with all of the functionality to operate in 3D Matrix Balanced Fill-Fash, Standard TTL flash, and other flash modes, with modern Nikon cameras (N80, N90s, F100, F4, F5).
A Quantum battery is a battery pack accessory to boost the battery power on the speedlight; meaning, to make it recycle faster and last longer (greater number of flash bursts).
To "knock" the flash down one stop, means to ask from it less than is needed as to make more subtle. So, if your ISo speed film is 200, you set ISO 100 (I f/stop less) on the flash to obtain such results.
Do you need an accessory handheld lightmeter in addition to the meter on your camera? No if you have a good camera. Any of those above mentioned do not need suich addition. They in fact have three meters in one as they can be used in matrix metering mode, center-weighted metering mode and spot metering mode, to take care of any imaginable lighting situation an what you may want to expose well specifically within your frame.
"Converters" is the short for teleconverters. This are special lenses that go between the body and the lens, expanding its focal length.
For example, a 1.4 Teleconverter will change a 100mm f/2.8 lens into a 140mm f/4. They also work well with zoom lenses. In this case, for example, a 80-400mm f/4.5-5.6 variable aperture zoom lens wil transform itself into a 112-560mm f/6.3-8 zoom lens. There are also 2X teleconverters and even 3X teleconverters. Hope that helps. Have a great time :-) JRP
For more information about using Nikon camera equipment, visit nikonians.org
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