Posts Tagged review

Review: Canon EF 100mm f/2.8 Macro Lens

100mm Generally speaking, the Canon EF 100mmis a great lens. The bokeh is fine. The lens is pretty fast. f/2.8 to f/22 is useful as a creative range. The optics are sharp and the all-time focusing is a boon. So what’s not to like? Well, here’s the thing. The Canon EOS50D, which I use, has the ability to use the viewfinder in “live preview” mode, and when doing so, will allow you to zoom in on your focus point (or anywhere else, but that’s irrelevant to my point here) such that you can see extremely fine detail. At which point you can manually focus the lens so that it is exactly right. Marvelous, right?

It would be. But the lens has some mechanical backlash problems. Let me explain backlash; if you’re not familiar with it, it takes a bit of describing.
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Review: Phoenix 500mm Catadioptric Lens

phoenix500 The Phoenix 500mmis a catadioptric lens. That means that it is very similar to a reflex, or mirror, telescope, and that it mixes mirror elements with refractive elements. The light comes in the front of the lens, goes right to the back of the lens, where it hits a large (full lens circumference) concave mirror, which then focuses all that light more tightly back in the direction it came. In the middle of the business end of the lens is another mirror, which then sends the light down the center of the lens back toward the camera, where standard refractive optical elements further magnify and focus the incoming light prior to hitting the film or sensor. A lens of this type is not only similar to a reflector telescope, it can actually perform as one, and you can find eyepiece attachments for just that purpose.

One of the significant benefits of a catadioptric lens is that you get less chromatic aberration, and so with subjects like the moon, which you expect to be grey, you actually get a grey image. With a standard refractor telephoto, you’re quite likely to get colored fringes on sharp bright/dark boundaries – this is an area where reflectors can and do excel, and this lens is no exception.
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Review: Monster MP PRO 3500

mp3500
My A/V system has a fair amount of stuff. There’s what I call the current generation set of gear… There’s a Sony STR-DA5300ES receiver, a separate 750 watt power amp for my sub, a PS3/Blueray, an XBox360/HD-DVD, a conventional progressive scan DVD player, a Wii, a DBS/DVR, a Mac Mini and a CD/MD player. Then there is what I call the last generation set of gear, an XBox, a PS2, and a Gamecube. There are several wall warts for things like rechargeable Wii controllers, an XBox 360 wheel, a network switch, a power supply for the dish multiplexer and so on. All of this feeds an Optoma 1080p projector which has its own UPS that also runs the Mac Mini (you really don’t want a projector to suddenly lose power… the fan stops and the bulb immediately overheats, losing lifespan or even dying right there on the spot; and of course you don’t want power to a computer failing, ever.)

The wiring for all this stuff is… formidable. Prior to getting the Monster unit, there were multiple power strips and cables just everywhere. So the first thing I got out of the MP PRO 3500was increased organization and lessened clutter. I still needed a couple of power strips, partially because wall warts take up so much room, and partially because there are just so many units, but trust me, it is a lot better than it was.
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Review: Canon EOS 40D

I’ll start off by saying that yes, the EOS 40Dreally is a great camera. I bought it as body only, then added a Canon EF 100 f2.8 Macro USM lens. If you’re not familiar with that lens, it is fairly heavy, and so the camera has felt heavy to me since day one. But it was the lens creating that impression.
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