lens advice

[oTTer]

Ok, I have a pentax with the 18-55mm lens, and the 100-300 mm lens. The problem I have is sometimes I need something in between, and I am not sure what I am looking for. I was at a ranch that raises bucking bulls, and they were bucking them out, and the small lens left everything far far away, whereas the big lens was chopping off heads and feet because it brought everything too close. I've seen 55-300mm lenses, is that what I am looking for? I talked to Michael Forsberg this evening and he said to stick with the Pentax brand, but is the range of the zoom going to affect things like shutter speed etc? Should I be looking for something that doesn't go as far as 300? With the big lens, I had it backed off as far as possible and even then it wasn't able to get everything in all the time. I am thinking something around 70mm would be fine, but if I'm using it in broad daylight, I should be able to snap the same number of pictures. Any ideas or thoughts?

[bob_r]

You didn't mention your budget or if you're looking for a zoom or a prime. I used to own a Sigma 50-150 f/2.8 lens that produced excellent images. It's not a cheap lens, but it shouldn't be with the fixed f/2.8 and the quality.
Here's a link if you're interested: http://www.bhphotovideo.com/c/product/5 ... II_EX.html

I'm not familiar with Pentax lenses, but they may have one that would work too. Maybe someone that shoots with Pentax will offer some suggestions.


BTW, the lens won't have any affect on how many pics you can take. The lens will affect your shutter speed since shutter speed ties to ISO and aperture settings. The fastest zoom lenses are f/2.8 and will allow you the fastest shutter speeds unless you go to a prime (non-zoom lenses). Primes allow you to shoot using larger aperture settings, but they will reduce your DOF. The shallow DOF can be great when you're trying to separate your subject from your background, but it can also blur part of your subject if it's too shallow. Hope this helps.