Sony DSLR-A330 Flash
Sony A330 Flash
The Sony A330 features a built-in, pop-up flash, which operates in either Auto, Fill-Flash, Slow-sync, Rear Sync, Wireless, and Flash-off modes. To release the flash from its compartment, press the button on the left side of the pentamirror housing. Close it again by pushing the flash head back down.
The Flash mode is changed from the Function screen. In Auto flash mode (available only in the camera's Auto or Scene Selection modes), the camera automatically determines when to fire the flash based on the existing lighting, and will pop-up the flash automatically. In Fill-Flash mode, the flash fires with every exposure, regardless of lighting conditions. Slow-sync mode fires the flash for foreground fill exposure, while allowing the background to burn in. The Rear Flash Sync mode fires the flash at the end of the shutter time, rather than the beginning. If you have moving objects in the scene with lights, as with a car, this will produce a sharp image of your subject, with a "motion trail" following behind it when shooting at slower shutter speeds. The flash is off when Flash Off mode is selected, or when the flash is down in non Auto exposure mode.
The A330's built-in flash has a Guide Number (GN) of 10 meters or 32.8 feet at ISO 100. That's a bit below the average of about 12 meters for Consumer SLRs we've tested, but from the test results below, we think Sony is being conservative with this spec. Maximum sync speed is 1/160s. High Speed Sync (HSS) shooting with shutter speeds up to 1/4,000s is available with Sony HVL-F58AM and HVL-F42AM external flash units.
A Red-Eye Reduction option is available through the Custom 1 menu. When Red-Eye reduction is enabled, the camera will fire a few low-power flash pulses before it actually snaps the picture, to make the pupils of your subjects' eyes contract.
The A330 also has a top-mounted hot shoe for attaching an external flash unit. The shoe design and contact arrangement are set up for Sony's own dedicated flash units.
Flash Test Results
Coverage and Range
Powerful flash with good range, but uneven coverage at wide-angle. Our standard shots required no exposure compensation.
Coverage and Exposure. Flash coverage was uneven at wide-angle (18mm), but much more uniform at telephoto (55mm). In the Indoor test, the Sony A330's flash required no exposure compensation adjustment to get good results. (Most cameras we've tested required about +0.7 EV for this scene.) The camera's Slow-Sync flash mode produced slightly brighter and more even results, though with a stronger pinkish-orange cast from the room lighting.
ISO 100 Range. At wide-angle, flash shots at ISO 100 started out a bit dim at 6 feet, but then increased in strength at 7 feet and then remained fairly bright all the way out to a distance of 16 feet. At full telephoto and ISO 100, the target started out a bit dim again, but brightness didn't fall off until about 12 or 13 feet.
|Manufacturer-Specified Flash Range|
Manufacturer Specified Flash Test. The Sony A330's built in flash is rated with a Guide Number of 10m at ISO 100. That works out to about 9.4 feet at f/3.5 and 5.9 feet at f/5.6, the maximum apertures of the kit lens at the two ends of its zoom range. In the shots above, the Alpha 330 performs as Sony says it will, producing a good exposure at the rated distance with its ISO set to 100 at wide angle, though it's a little dimmer at telephoto, as were our ISO 100 flash range shots. Our standard test method for flash range uses a fixed setting of ISO 100, to provide a fair basis of comparison between cameras. We've now also begun shooting two shots using the manufacturer-specified camera settings, at the range the company claims for the camera, to assess the validity of the specific claims.