When buying a lens whether it is a new or secondhand lens, what you want to know is "How good is it?"

Therefore the review should contain an in-depth description to a level that you would want to read if you were potentially purchasing this lens.  Try and be honest and give a detailed review as you would want to read yourself, do not just rate everything as a 5 as this would probably not be true. Try to describe how the lens has worked for your and what was were the positive and a negative aspects of using this lens.

Did you feel like you had value for money, would you buy this lens again if  you know what you know now.

What we would recommend is to firstly consider the price / usage ratio of the lens. Lenses can range from a couple of hundred  to several thousand pounds / dollars, therefore you would not expect the same lens quality for a lens at the lower end market to a high end prime. Please consider the price range of the lens in your rating.

When reviewing a lens on lens-reviews.com there are a few things you need to think about,

o       Your experience of the lens being reviewed.

o       What will other people want to know about this lens, sharpness, build quality.

o       Your satisfaction.

o       Cost.

o       The experience when using this lens

On lens-reviews.com there is the ability to assign an overall rating (weighted) up to 5 for the following areas:

Sharpness

Build Quality

AF Speed

This relates to overall sharpness, not just at the centre on the best aperture. We want you to take an overall view of sharpness of all shots taken with this lens. Don't just give it a 5 because you have had several sharp images. Try to be a little more in-depth about sharpness in your review. 

Is the build quality of this lens what you expected?  Now in this modern age lens build quality is       of a fairly high standard. Try and identify areas that you consider are either better or worse than you expected.  Also consider whether the mechanical actions feel positive and secure.

This will depend on the type of lens you have, so you need to review whether you think the AF speed for a lens of this price is better or worse than others in the same range. There is no point trying to rate the AF speed of a lower end F5.6 lens with a top of the range F2.8 as this would not be a fair comparison.

All modern lenses enable you to take good quality images, however you should consider whether the difference in cost is value for money in comparison to the additional quality of the image produced.  You will get a lot more value for money from a cheaper lens, as it does the same as a lens that is four times the price but just not as well. But no matter how much you have paid you should feel that the lens is achieving your expectations for the price you paid.