1. YCC Practical Evening 18-Jan
Subject: Lenses and Filters
By Peter Holt
and Steve Carpenter

2. Filters: UV, ND/NDgrad, Polarised filters.
Differences between costly 'pro' grade lenses and their cheaper counterparts.
Lenses: Pros and Cons
Lens Reviews
Time to get Hands on and use the Lenses

3. Filters UV (Ultraviolet)
The filter blocks UV light and removes the blue cast from images taken in very bright sunny conditions. Used for Film, almost completely spurious for modern digital cameras, digital sensors are generally rather insensitive to UV.
Question: When would it still be a good idea to use a UV filter on the lens?

4. Filters ND/Ndgrad (Neutral density filter)
Reduces or modifies the intensity of all wavelengths or colour of light equally, giving no changes in hue of colour rendition.
Used to reduce light entering the lens which can allow the photographer to use combinations of aperture and exposure which would otherwise produce overexposed pictures.

6. Filters
Polarised (Increasing colour saturation and reducing reflections in non-metallic objects)
Without Filter With Filter

7. Which image one has used a Polariser Filter?

8. Differences between 'pro‘ and cheaper Lenses.
Polariser Filter: Advise
The effect is usually at its most obvious when you’re shooting at right angles to the sun, rather than with the sun behind or in front of you.
When using a polariser on a wide-angle lens, particularly if you’re shooting blue skies, you need to watch-out for darker ‘bands’ appearing in the sky due to the polariser darkening the sky unevenly.
If this occurs you should rotate the filter until this disappears, or even consider removing the filter altogether.

9. Differences between 'pro‘ and cheaper Lenses.
Things to think about when buying a new lens
What photos are you looks at taking, (Landscape, Portrait’s, Macro?)
How often do you take this type of photo (weekly, monthly or only once or twice a year?)

10. Differences between 'pro‘ and cheaper Lenses.
Ask if anyone you know has the lens you are looking at buying and see if you can borrow it for a day, week or longer if you can.
Are you able to carry the lens in your kit bag?
Prime or Zoom Lens?

11. Differences between 'pro‘ and cheaper Lenses. Pros and Cons
Prime lenses are not only able to shoot wider apertures, but will generally outperform zoom lenses, They offer sharper, crisper shots that a zoom lens simply cannot match, especially at the wider apertures such as f2.8 and cost less.
Zoom lenses are better if your shooting requires you to capture subjects in fast moving environments, (Street or Sports Photogrpraphy) so the versatility of a zoom lens is unbeatable.
Buy the best zoom lens you can afford.

12. Differences between 'pro‘ and cheaper Lenses.
I’m not going to tell you what lens you should buy but what advise I can give you is.
If you are unable to borrow the lens from someone see if a shop has it is stock so you can put it on your camera and see if you are happy with the way it feels, take photos in the shop? (Weight, Autofocus, Check it will fit in your kit bag).
Before you buy any lens check out the reviews on the lens.

13. Differences between 'pro‘ and cheaper Lenses.
COST: Why Are Some Lenses So Expensive?
Should You Buy a Cheap Camera Lens or an Expensive One?

14. Differences between 'pro‘ and cheaper Lenses.
Compare Lenses Side-by-Side

15. Differences between 'pro‘ and cheaper Lenses.
Time to get Hands on and use the Lenses