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?
Getting back to the original posting, I guess one lesson to be learned is that it can't hurt to take a small, flexible lens lens along to complement primes when going into an unclear situation.
I would certainly have taken a zoom on a trip such as the OP described, but I woud have tested it thoroughly first.
On digital it is very easy and inexpensive to put a lens through its paces and evaluate the results. You can shoot the same subject with another lens and compare. If you are reasonably experienced you can look at files at 100% or higher in your image editor and see for yourself whether the results meet your requirements for the project you have in mind. It also helps you make best use of the lens you have.
Part of the evaluation process is to be clear about your requirements.
For example, a reasonable expectation for an amateur at a wedding would be files good enough to make a sharp 12x18 print. For this project sharp is defined as clear facial features and clothing, achieved with mild to moderate sharpening with no visible artifacts even at short viewing distances. A bit of planning and testing in simulated situations will show whether the lens proposed for the project will meet those standards outdoors at mid apertures or indoors wide open. If the lens doesn't cut it, you have demonstrated a real need for something better.
So before getting dragged into the endless quest for anything but the kit lens, clearly define what you really need. Test your kit lens and see for yourself whether it delivers or not. Analyse where it hits and misses. Look for easy workarounds. (An image is a bit flat? Fix it in curves and/or levels rather than throwing away the lens.) Decide whether the failings are really critical in terms of your current requirements. (Real requirements, not the "I might have to take pictures of supersonic aliens in a coal mine" type.) Clearly identify what you need to overcome critical shortcomings.
You'll then have a better basis for strategies for using the lens, or criteria for selection of replacement or complementary gear.
Anyhow, my own experience with the kit lens is that it is a convenient and competent product capable of pleasing results at mid apertures, which is the way I nearly always use it. With it I produce 12x18 prints that experienced people mistake for shots on full-frame DSLRs with expensive lenses. The post-processing required to achieve that quality is by my standards pretty basic. A lot of us would consider that pretty good. Others would call it pitifully bad, but I guess I can live with that.
John