Lens Used
Lens Used
What is this type camera lens used for?
I was given a camera that has a "70-300mm 1:4-5.6 macro" lens. I am trying to determine what this lens is best used for. What are it's characteristics?
That is a very versatile lens. It can zoom from just a little above the "normal" 50mm length to a really tight telephoto that makes it look like you are much closer to the subject than you really are, And the marco part means you can get close to things and get a lot of detail. This is a good all-purpose lens for anything except panoramic landscapes. Enjoy!
 Used Nikon Nikkor 18 135mm f 35 56G AF S DX ED Lens US $152.51 
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 NIKON Nikkor AF 35 70 mm F 33 45 Lens Excellent Used US $99.99
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 USED Canon EF 24 mm 70 mm F 28L USM Lens US $950.00
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 Nikon AF Nikkor 35 80mm 14 56D Lens used US $68.00
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 Lightly used Nikon 18 200mm zoom lens Excellent condition US $520.00
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 Canon EF 100 mm 400 mm F 45 56L IS USM Lens Lightly Used Great Price EOS US $1,126.00
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 CANON EF 70 210mm f4 ZOOM LENS MK1 EOS 60D T3i USED US $129.99
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 CANON EF 24 70mm f28 L USM LENS EOS 5D 1D 60D USED US $835.00
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 MINOLTA AF REFLEX 500mm f8 LENS MAXXUM SONY ALPHA USED US $466.00
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 SIGMA DC 55 200mm f4 56 LENS NIKON D300 D90 USED US $79.99
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 CANON EF 28 80mm f28 4 USM L LENS EOS 60D 5D USED US $499.99
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 NIKON AF NIKKOR 50mm f18 D LENS D3 D300 D700 D90 USED US $101.00
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 MINOLTA AF MAXXUM 100 300mm f45 56 Xi LENS ALPHA USED US $99.99
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 OLYMPUS MZUIKO DIGITAL 9 18mm f4 56 LENS PEN MICRO FOUR THIRDS USED US $499.99
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 CANON EF S 18 55mm f35 56 II LENS EOS 50D XSI USED $1 US $51.00
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 PANASONIC LUMIX G 20mm f17 ASPH LENS 4 3 MICRO USED US $305.00
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 Used Cosina 2x 7 Element Tele Extender for RK Ricoh Mount lenses US $9.99
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 Used Konica KA Mount Ozunon MC Auto Zoom 35 70mm f 35 48 Lens US $18.99
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 Used Minolta AF 35 70mm F35 45 22 Zoom Lens for Sony Alpha Cameras US $24.99
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 Canon EF II 50 mm F 18 II Lens slightly used US $87.00
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 Canon EF 14 mm F 28 Lens NO RESERVE USED MINT CONDITION US $1,025.00
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 PRE OWNED Canon EF 16 mm 35 mm F 28L II USM Lens GREAT CONDITION US $1,100.00
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 Soligor movie lens screw mount 1 1 2 35 mm f 19 in used condition US $86.00
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 SMC Pentax F 35 80mm 14 56 Zoom Lens in used but excellent condition US $20.00
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 ANGENIEUX ZOOM LENS F 18 180mm TYPE 10x18 J1 122 1207061 GOOD USED US $99.00
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THE PROS AND CONS OF USING A FOUR COLOR PROCESS
There are so many articles written about the four color process
but the question on its usefulness still requires further
explanation. There are actually three primary colors of light
that the human eyes perceive and these are red, blue and green.
So why create a four color scheme? Although the three colors can
already come up with various color mixes but the problem with
the combined colors is that it is never great when it comes to
printing on papers. And so technology calls for the creation of
colors that can solve the problem of printing on papers thus the
creation of CMYK which stands for cyan, magenta, yellow and
black.
The combination of any of the four colors would result to the
three colors of red, blue and green. Just how is this achieved?
Well, in order to come up with the yellow color, the colors red
and green are processed. The black color is the outcome of the
combination of the other three processed colors. The importance
of black in printing is that it adds intensity to printed
images.
The crude way of printing images or pictures is to break it into
its four color components by the use of a process camera as well
as four filters. The process camera is a special type of camera
which is designed for copying flat art. It makes used of a high
resolution flat field lens used to take pictures of flat
objects. The process camera also works well for line shots
images that have no gray tones, halftones or color separations.
On the other hand the filter to be use requires fine screen made
up of dots. Individual screens are used to filter the four
colors. After which the film would then be process and then
printed on a metal plate that is specially designed for such
purpose. The next step would require placing of the metal plate
on the printing press.
However, the four color process is not without flaws. Most of
the common problems encountered with the use of four color
process is the difficulty in creating vibrant colors
specifically when it comes to the colors red and violet. Another
drawback is the expensive cost of correcting colors. An example
of an error in color is when images appear too dark. However,
the quality of colors is also dependent on the type of paper
used. The difference in the quality of colors is imminent
especially when applied in a textured and high quality
reflective paper. The high quality reflective paper is best
preferred since it reflects the real quality of the colors. And
also there are instances wherein images looks good in prepress
or during the proofing stage but looks terrible when printed.
The used of water when mixing inks also results to images that
are not of good quality. There is also the tendency for the
plates to be accidentally moved from the press which would
certainly mess up the colors.
For comments and suggestions regarding the article kindly visit
4
Color Printing
About the Author
Jinky C. Mesias is a graduate of Bachelor of Science in Business
Administration Major in Business Management. She is at present
an Associate Manager of a Life Insurance Corporation and a
freelance writer.
Lens Used
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