Best Value DSLR - Sony A58

Started Nov 21, 2013 | Discussions thread
Shield3 Senior Member • Posts: 2,440
Re: The K50 is serious bang for the buck too

Vikas Rana wrote:

Not exactly true. To someone who prefers looking at an optical image over an electronic image --- The EVF never fully compensates for an optical image.

And while some day, processing and buffer speeds may increase... In fast burst shooting, EVFs currently lag and produce a slide-show as opposed to a live image.

Well in multidimensional OVF, Not all the light reaches to the eyes. Normal mirror can only reflects 80 to 85% of light and only silver/gold plated mirrors can reflect 90 to 95% of light. So if you have pentaprism or pentamirror OVF, you will loose 10 to 20% of light in every single dimension and after all the processing via OVF you will only receive 40 to 50% of light. This is the only reason why low end cameras have 95% coverage. A high end OVF with 70 to 80% output would cost more than $600.
Also, reflection, optics, and water slows down the speed of light to 124,000 miles per hour. Scientist have also proved the effect on speed of light by optics and other objects. They managed to slow the light speed upto 9.7km/s in 2004. The results in your eye will not be as fast as you think.

If A65 or A77 can save a minimum of 8 images of 24mp each per-second and still have some left in buffer than I can imagine their processing speed will be around 12 images per second. Means they can process 288 mega-pixel per second. So to populate a 2.4million dots of EVF requires 2.4mp of image so the total reaction time or delay on an EVF is not more than 1/120 or 0.008333 second. The normal reaction time of a human is 1/5 or 0.20 second if not drunk!!!

All sounds good, but if you've ever shot a burst tracking a subject the EVF cameras up to this point still blackout enough to distract you. Too much of a delay. Also I get 0 FPS when my EVF has chewed up all my battery. I like a bright OVF during the day, and an EVF at night. Be neat to have both.

Flipping mirror will also black-out the OVF... PDAF works with SLT with more accurate focus

Have you ever used a Canon 7d or 5d3 to shoot sports?  I have and do.  I get far more keepers and can much easier track moving subjects and have a far higher hit rate than I ever did with Sony SLT's.  12FPS is nice if you're shooting a stationary target (like someone's golf swing) but if you're following action across a field the SLT's just don't cut it - too much of a black out delay coupled with a very wimpy buffer.  On 1000x cards I get 30 shots in 5 seconds in full raw, with continuous AF.

More accurate focus?  The SLT bodies I used very often would focus on the background instead of the subject.

 Shield3's gear list:Shield3's gear list
Canon EOS 5D Mark III Canon EF 35mm f/1.4L USM Canon EF 85mm f/1.2L II USM Canon EF 135mm f/2.0L USM Canon EF 70-200mm f/2.8L IS II USM +2 more
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