Originally posted by LucyGoosey So I just got back from a trip, a destination wedding in the Caribbean, relying solely on on my 40mm da pancake lens. I chose to take this instead of the kit lens because of the compact size and slightly faster glass. But I had a hard enough time getting shots of groups b/c 40mm wasn't wide enough. Should I have just taken the kit lens instead? Is there a better, affordable alternative, like Sigma, to the kit lens at f/2.8? Or, should I have just focused more on framing the shots?
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Pentax SLR Lens Discussion
I really like the 18-55 kit zoom - lots poo-pooh it as it is a kit zoom - but it is one of the better kit zooms out there - the original Mk 1 was liked a lot and the more recent Mk II is even better.
I use the lens at the 18mm end a lot that max aperture is f/3.5 which is not that much slower than f/2.8 the possible max aperture for a 18mm prime, or premium zoom that encompasses that focal length. (f/3.5 is about 2/3 stop slower than f/2.8)
The main advantage of the zoom is obviously its flexibility to allow in camera cropping - or framing as precisely as one's patience/tolerances will allow.
As you have found even though a prime may theoretically be superior optically it is just not that flexible - there are many situations when one may not make up the single focal length limitation by moving closer or further.
Whereas a zoom may still not be a panacea - and one ought to still move and adjust one's position for better angle and/or perspective - but it is much more flexible allowing one to frame the shot properly as opposed to accepting a compromise.
When one can actully use the full frame without much cropping then that utilizes the maximum quality of the shot - whereas a prime with severe cropping may not be able to make up for the quality loss from the crop and using a smaller area.
It may seem like going against the tide - but perhaps you'd like to look at this thread:
Kx in Use
where I have been using the K-x in pretty challenging lighting conditions -
ISO5000, f/4, 1/30 would be about my average -
that's about 2 foot-candles = 22 lux = 22 lumens/sq metre
I only use the kit zoom lenses 18-55 and 50-200.
There are some who seem to poo-pooh the kit zooms, but the Pentax kit zooms are actually of very good quality as reviews (and hopefully my results) show.
Popular Photography tested both the
original 18-55 (as the Samsung clone) and the more current 18-55 AL II versions -
this is the very useful SQF (Subjective Quality Factor) chart - from their review of the Pentax DA 18-55 AL II -