On Sat, Feb 16, 2013, Rob Studdert wrote:
> On 16 February 2013 01:52, Aahz Maruch <[email protected]> wrote:
>> On Fri, Feb 15, 2013, Rob Studdert wrote:
>>> 
>>> When it's a 10-20mm zoom perhaps?
>>
>> Again, when would you use that instead of e.g. a 14mm?  I'm looking for
>> specific use-cases, particularly from people who use both zooms and
>> primes.
> 
> Well in my case I own many primes and zooms covering the same focal
> lengths, what determines the lens that I turn to for any particular
> shoot or event is a function of many factors. In its simplest form If
> I need flexibility in framing and the ability to change the FL fast
> and if the slight loss of speed wont pose a problem due to slower
> shutter speeds and if I don't need absolute premium image quality then
> I'll reach for the zoom. If I can handle the weight and I a fixed FL
> isn't an issue and I want to optimize IQ then I'll often consider a
> prime. Of course this is very general, there are many other factors to
> consider such as AF speed, propensity to flare, sensitivity to
> blooming, CA characteristics, contrast, edge performance, geometric
> distortion. It's a complex issue and the only way to keep it simple I
> guess is to not buy lenses with overlapping FL and just learn to deal
> with each lenses particular limitations.
> 
> Specifically in the case that I mentioned my 10-20/3.5 zoom is
> actually a bit smaller and lighter than my FF 14/2.8 lens but both
> have their good and bad points so for now I will keep both.

Thanks!  That's most of what I was looking for!
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