Pentax K100d

Pentax K100d Latest Advanced Consumer DLSR

Front View

Front View w/o Lens

Front Left View

Left Side with Lens

Top View

Back View

Right Side View

San Disk, Secure Data (SD) Ultra II Plus

Left Side View

Bottom View

Main Features
AutoISO
Shake Reduction
Depth of Field Preview (with live preview)
16-segment multi-pattern metering system
Picture and Scene Modes "Auto Pict“, six programmed picture modes for specific scenes: portrait, landscape, macro, action, night scene portrait, and flash off. 8 additional scenes modes available: night scene, surf and snow, text, sunset, kids, pet, candlelight, and museum.

For “Treatment of Motion”
Do NOT use Auto ISO
Use ISO 200…we WANT a slow shutter
Do NOT use Shake Reduction
We want to show motion

Main Features, Cont.
Advanced 11-point autofocus mechanism…with 9 of those being cross-type sensors (capable of detecting both vertical and horizontal focus) the SAFOX VIII autofocus system on the K100D Super uses nine cross-type sensors … meaning greater autofocus accuracy

ISO: 200-3200 Auto ISO is the default setting for the auto and scene shooting modes and will set a sensitivity between 200 and 3200 as it deems appropriate. You can also limit the auto ISO range to whatever you choose, such as 200 to 800. ISO 200 is the default for the P, Tv, Av and M modes unless you have previously selected an ISO. ISO may also be manually set at 200, 400, 800, 1600 or 3200.

Why shoot a flower at ISO 3200? It is just a test.

Noise Sample

Noise Sample 2: Long Exposure

ISO 200

ISO 400

ISO 800

ISO 1600

ISO 3200
ISO200 and ISO400 both produce very clean images, and even by ISO800 noise levels are well controlled. Images taken at ISO1600 have more noise present, but not excessive amounts. Things start to get messy at ISO3200, this sensitivity should be reserved for when nothing else will do as the level of noise will be clearly noticeable, even in smaller 6x4inch prints.

K100d vs. Other Cameras…ISO
The K100D performs well for its price point. Noise levels are acceptable, being better than the Pentax-based Samsung GX-1S. The Canon EOS 5D outclasses the Pentax, but then it should do, it costs around three times the price of the Pentax.

So, why shoot at HI ISO?
Because it’s 4x as sensitive…giving you 4 stops faster shutter speed.
Example: If your BEST shutter speed in a dark place, like a concert, is 1/15 of a second @ ISO 200…you would get:
1/30 at ISO 400
1/60 @ ISO 800
1/125 @ ISO 1600
1/250 @ ISO 3200…which is fast enough to stop somebody who is jumping around on stage…or flying through the air

1/320 @ 6.3, ISO 2500, 270mm, 6:20pm

1/80 @ 6.3, ISO 5000, 500mm, 6:36pm

16 mins later, despite 2x ISO…too much blur.
So, I decided to call it quits after this shot.

Resolution
4M,  (better) is more than enough

DSLR Advantage 2/3” 5mp vs. APS-Sized CCD

Menu Button
Press Menu, then arrow selection buttons to navigate. Use right arrow to select. Use OK only when prompted.

Which is 6M    and which is 1.5M  ?

Which is…

which?

See if you can tell now.

And you would have to be making some REALLY large prints (or cropping a LOT to tell this in a print.

Function Button

Function Button
Left… AWB = White Balance
Up… Drive Mode = Single, Continues, Self –Timer, Remote, etc.
Right… ISO = Set to 200…do not use Auto ISO
Down… Flash Mode…

Info Button
This screen is shown when you press the Info button while taking pictures

Shooting Modes

Shake Reduction
PENTAX original Shake Reduction mechanism for sharp, blur-free images
Using magnetic force, this SLR system shifts the camera’s image sensor vertically and horizontally at the optimum speed to compensate for the amount of camera shake detected, assuring outstanding compensation effects (equivalent to approximately 2 to 3.5 shutter steps). Since this versatile system is compatible with all existing PENTAX interchangeable lenses*, it does not require special anti-shake lenses equipped with add-on optics or devices.

Shake Reduction System

Shake Reduction

Camera based vs. Lens based
PENTAX, Olympus and Sony (formally Minolota) use camera based
Advantage: ALL lenses used on the camera will benefit from the reduction of camera movement
Disadvantage: movement is greatest at the end of a lens…so camera based is not as effective for long lens stabilization.
Nikon and Canon use lens based stabilization.
Advantage: Image movement is the the most significant at the end of the lens where stabilization is most benefited.
Disadvantage: Each lens has to have the costly components driving up the cost.

Lens Performance
18mm
Barrel Distortion with light fall off

Resources
http://www.dcresource.com/reviews/pentax/k100d-review/
http://www.digitalcamerareview.com/default.asp?newsID=3182&review=pentax+k100d+super
http://www.ephotozine.com/article/Pentax-K100D-Super-1
http://www.pentaximaging.com/products/product_details/digital_camera--K100D_Super/reqID--9997004/subsection--digital_slr#
http://www.pentaximaging.com/files/scms_docs/SHAKE_REDUCTION_FACT_SHEET.pdf
http://www.imaging-resource.com/PRODS/K100D/K100DA.HTM

RAW vs. JPEG
RAW is the PREMIER way to shoot pictures…but it generally unnecessary and excessive.
PROS
100% Pixels recorded in uncompressed format (side note…some manufactures now offer a virtually LOSSLESS Compression for their RAW files…note the keyword VIRTUALLY.)
Exposure data is recorded in a separate header file. IOW, the exp info is stored separately from the pixel data allowing for greater flexibility
CONS
VERY large files (12-22mb vs. 2-4mb PER picture)
Requires more storage space
Slows down access, especially slow computers
Proprietary file format that requires special software to even view and definitely to edit.

RAW vs. JPEG Key Points
When shooting with JPEG, even in the best quality, 20% of the data is lost via internal compression.
When you shoot a picture, it is stored in a buffer.
The camera’s built in CPU then very quickly analyzes the image captured, applies exposure settings (white balance, exposure compensation, sharpening, tone, etc.) and then compresses the image as it is stored on to the memory disk, clearing the buffer for more pictures.
Shooting in RAW is MUCH slower because of the data being processed…BUT…the data is store separately from the pixels allowing the data to be change non-destructively at a later date…multiple times even.
Better cameras have larger and faster buffers so as to limit the speed impact on actual shooting…but even the buffer can fill up.

RAW vs. JPEG Analogy
RAW is to shooting JPEG as Printing from a negative is to printing from a print.
If you shoot in JPEG, you do not have all of your picture. It would be like shooting film, getting the pictures printed, and then throwing away the negatives. Those pictures MAY be just fine…but if you needed to go back to work on the original image, it would be gone and you would be left with working with printing from a print (at a significantly lower quality).
IOW, JPEGs have already been processed for you…taking the control AWAY from the user. But this is not always a good thing.

RAW JPEG Exif Pixels

http://www.luminous-landscape.com/tutorials/understanding-series/u-raw-files.shtml

Pentax K100d

by Drew Loker on Oct 22, 2008

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Pentax K100d — Presentation Transcript