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Rezensionen (5)
09. Nov 2015
Powerful, versatile flash at a bargain price
I now own 2 of these Vivitar 283 flash units. One I bought back in the 70s, one recently. The guide number at ASA 100 is 120, so they have plenty of power. The auto thyristor sensor has five settings, and has always done a good job of giving proper light output. The multi-angle flash head automatically compensates (boosts) light output when it's not pointed directly at the subject. There are many accessories available very inexpensively. I own a vari-power module that replaces the auto sensor. It can be set anywhere from full power to 1/16 power. I also own a lens kit which changes the spread of the light beam. In 35mm terms, the lenses are 24mm, 28mm, 70mm, and 135mm. The 24mm and 28mm can be used as diffusion filters to soften the lighting effect. at any focal length. Also in my collection of accessories are a color filter set, a cord to run the flash from an AC outlet, a bracket that holds a standard white/gray card for using the white side to bounce the flash, and a cord to use the flash off-camera. I'll soon be getting the SL-2 auto slave adapter also. You can buy all of this, including the flash, for less than the price of a new Pentax auto flash with a guide number of 54 at ASA 100 with no accessories. The Pentax has more features; the Vivitar has more than twice the power. Any serious photographer will know how to set up/use a manual flash lighting scheme, so as far as I'm concerned the Vivitar 283 is a great buy. CAUTION: older 283s have a high trigger voltage. My old one is over 300 volts, and would probably fry a DSLR. The newer one has a trigger voltage of 8.8V, and I have been using it on the hot shoe of my DSLR with no problems. I'll use the old one as a slave. The 283 has a well deserved reputation as a reliable workhorse. My 35+ year old unit works as well today as when it was new. The mounting shoe is plastic, and the unit is relatively heavy. Care must be taken when it's mounted to prevent the shoe from cracking. I've been moderately careful with my old unit for 35 years and have not had a problem.
The new auto flash units are great since they 'talk' to the camera and make adjustments automatically. The old school 'dumb' units like the 283 can't do this. However, if your DSLR has an aperture priority mode and you know how to use it, the 283 will perform extremely well. I have read reviews and seen youtube videos of professional photographers using them as the foundation of their studio lighting setups. At the typical prices on e-bay, you can have your own 'professional' muti-unit flash setup for about the same price as one good auto flash. Viva la Vivitar 283!
15. Jan 2016
Dual 45° Split image Focus Screen For Pentax K20D K10D
I bought this focus screen to replace the standard screen that was in my Pentax K10D camera. I use vintage manual focus lenses on this DSLR, and the plain screen that came with the camera made it difficult to focus accurately. I wanted to get a Katz-Eye split image screen, but they were close to $100. This Chinese version was $20 so I decided to give it a try.
Coming from China, it took awhile to arrive. When it did arrive, I was very impressed with the thought that went into the packaging and the components of the installation kit. Included are plastic tweezers with soft tips for grabbing the screen to prevent scratching. Instructions are included also, though they are a bit cryptic. I had watched a video on how to change screens in a K10D. It's very easy if you have steady hands and are willing to be careful messing around INSIDE your camera!
You remove the lens, loosen a clip, remove the old screen, carefully place the new screen in the clip, and snap it back in place. It can be done in less than a minute once you're used to the procedure, but don't hurry the first time you try. The screen I bought was specifically designed for my camera model and fit perfectly.
I've been using the new screen for about two weeks now. It works just like my old film camera did. Aim the center of the viewfinder at an element in the image (post, wall, etc.) that you want to be in focus. When out of focus, the element will be split; when in focus its edges will line up. This screen makes it much easier to accurately focus manually. I haven't noticed any quality issues, except maybe for some very slight vignetting in the corners of the viewfinder. I can't swear that this wasn't there with the stock focus screen though. In any case it doesn't affect the recorded image of course.
Overall I've been satisfied with this purchase. It works as it should and hasn't shown any bad characteristics. I recommend it for anyone working with manual focus lenses. The Katz-Eye might be better quality, but I heard they were no longer in production. This will probably cause their price to rise even more.
18. Jun 2019
Couldn't be more pleased
I can see why this lens has a well-deserved reputation for excellence. Colors and sharpness are better than with any of my other lenses. Well built high-quality piece of kit. Pictures have that 'pop' that I was never able to achieve before I got this lens. Super pleased with it.