E-M1 to A7 movers: What do you miss?

Started Mar 4, 2014 | Discussions thread
Jack Hass Regular Member • Posts: 392
Re: E-M1 to A7 movers: What do you miss?

EarthQuake wrote:

Also for totally static shots I can get down to 0.5 seconds with a 50mm-equiv lens (P25/1.4) on my EM1, which is about a 5 stop improvement over the normal 1/FL rule for hand holding. This is noticeably better than the IBIS on the A900.

Agreed. Im not saying a larger sensor with better high ISO is never better, but it is the minority. There are three basic shooting scenarios. Low light, where motion is fairly slow or stationary, moderate light (such as gyms and very overcast days) where action is taking place, and bright sunny days or bright lights where action is taking place.

  • Low light: nobody is really going to try to shoot action here, so SS are going to be as low as possible to keep ISO down. In this scenario, IBIS can make up for better ISO figures. One with IBIS/OIS can shoot slower SS and lower ISO and get away with it.
  • Moderate light, action: This is where better ISO performance will shine, but it's only 1/3 of the deal. In this light, SS need to be higher, and it will be high enough to negate camera shake, but since light is in demand ISO will need to be high. In this scenario, better ISO performance is preferred. Indoor sports for example is an example where larger sensor/larger lenses are a benefit. This is why, IMO, Canon haven't bothered to add IBIS. They are much more sports oriented with cameras like the 7D, and sports shooters will have SS high enough to negate camera shake anyway. Plus there are also OIS lenses for when that is a must.
  • Bright light, action: This is a situation where light is so abundant that action is possible without ISO getting too high. Most action shots can be made without going over ISO 800, as long as the lens is fairly fast. In this case, better ISO performance is much less an issue as everything looks fairly good since ISO is low. Once again, IBIS/OIS is not needed since SS is fast enough to freeze normal camera shake.

This is of course a generalization, but it's accurate. Any other situation, like portraits in good light, isn't worth comparing since ISO is low, SS is less of an issue, or one can use flash, ect. The above 3 distinctions pretty much cover what is necessary, and non stabilized high ISO monsters only benefit in 1 out of 3. Don't get me wrong, something that is FF AND stabilized is best overall, but this comparison is based on the A7 vs something like an EM1 that has IBIS. The real world difference comes out surprisingly small.

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