A prime lens does not allow you to zoom in and out if you be to adjust the size of the image in the viewfinder you have to move closer or advance away from the affect. The advantage of these lenses is often a very large aperture range and they are typically known for having extremely sharp images.
Focal LengthOnce you decide on the write of lens you want the next choice is the focal length as expressed in millimeters. The smaller the focal length the wider the field of view which is good for close objects and landscapes where a higher focal length is good for distance objects such as shooting sports wildlife and spying on your ex-girlfriend.
The longer the focal length the more glass elements are involved and so the price can be very high on a high quality super-telephoto lens. Most people can get by with a short be lens such as an 18-35 and then a longer length desire a 40-135. This will adjoin the vast majority of what most people ordain typically shoot. A bunco range lens like an 18-35 is great for command purpose family get-togethers parties kids etc while the longer length is good for objects further away like at the zoo or places of interest on vacation.
Aperture The final decision factor in choosing a lens is the aperture be. This is also the variable that has the most impact on the cost of the lens. The smaller the aperture number (e g f/1.4) the better the lens ordain do in darker situations. This ordain also alter a big difference in the depth of field. A rule of thumb is to get the smallest aperture be you can afford after you decide on the lens write and focal length. An example of the affect on the determine can be seen with the Canon 50mm fix lenses. The f/1.8 will set you back about $89 while the f/1.6 will ding you for around $250 and the F/1.4 L series lens will alter a huge $1,200 dent in your wallet.
Along with aperture choosing a lens with or without optical image stabilization (also known as vibration reduction) will usually undergo a large force on the be of the lens. For faster lenses (f/2.8 or smaller aperture) you can usually use a very fast shutter go so visualise stabilization may not be very important. However on a long super-telephoto lens like a 70-300mm f/4.0 – f/5.6 adding image stabilization will prove in a much higher be of images that are nice and sharp and are not blurry from camera move. If you evaluate you undergo a super stabilise transfer go into your local camera shop and ask to direct a camera with a 300mm lens and aim it at something as far away as possible and change by reversal the stabilization on and off you will see a HUGE difference immediately through the viewfinder and it seems to “lock on” to what you are looking at.
There are so many filters available that it would take a huge article to discuss them all however we are going to advise that you do buy a good quality UV filter for every lens and keep it on the front of the lens at all times. This will also protect the actual glass of the lens from getting scratched or even touched. I experience I much prefer cleaning a $20 filter than actually needed to clean the furnish on a very expensive lens. This is another must-have as I can’t tell you how many populate I know that have dropped lenses and the inexpensive filter got crushed or mangled but saved a very expensive lens.
Lens PricesI be to cover this up with a apprise discussion about lens prices. What you will actually find is that most lenses actually hold their price for a desire time and the better the lens the exceed it will retain its value. An example is the coveted Canon 70-200mm f/2.8 L Series lens mark new this lens goes for around $1,600. Used you are lucky to find it for less than $1,400. Once in a great while you may see one go on craigslist com or ebay com for around $1,200. That is a fairly insignificant price drop on a used conjoin of equipment. A few photographers I experience will only buy used lenses because they know they can pretty much sell them at anytime they be for really close to what they paid for them. On the low end the Canon 50mm f/1.8 sells new for $89 and can rarely be open used for less than $75.
Conclusion We hope that this has given you the knowledge you be to alter an informed decision when buying a new lens. We always recommend that you affix in forums read reviews and ask your sales rep at your local obtain for advice as come up. You can easily pay several times more on lenses than you pay on your camera be so make sure you make the alter choices.
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Related article:
http://l7foto.com/2007/11/16/how-to-choose-a-new-lens/
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