Hi Nikonians......first post for me
Just acquired my D1X....awesome.....maybe just two concerns at this point
Dust on CCD (already !) and the overexposure problem with white subject material .
But I would really like answer to this question :
I had a recent assignment which required me to provide 150 images to my customer. I had a 256mb card loaded and resolution used provided me with 700kb jpegs. The client normally requests a photo album with orders for 4x6 and 5x7 with an 'occasional' 8x10. Will I get decent prints at 700kb or should I have used higher quality setting ? Secondly do I now save the images as tiffs on CD before making prints or write them to Cd as original jpegs ? Appreciate your advice!
#1. "RE: Capture and saving images !!" | In response to Reply # 0eba Registered since 06th Jun 2002Mon 22-Jul-02 04:39 AM
It's not easy to give a definitive answer to your questions.
I'm also quiet new to digital photography (with a CP 5k) and I've already collect some informations that probably will help you.
To get the best printed results, you should be able to print images at 300 dpi. So for a 8 X 10 print, you need a 8 X 300 X 10 X 300 =7200000 pixels. Some experiences showed that from 200 dpi, a "normal" user won't remark the quality improve. In our case (8 X 10 prints) a 3 Megapixels image will already be good.
As far as JPEG is concerned, JPEG reduces the image size by eliminating minor details of the original picture. How "minor" is depends on the quality factor you use and of course, the size of the resulting image file is also affected. As results, you can have some "pixelisation" effect (discrete pixels instead of a curve or line) or color approximations (in bands of color instead of a continuous change from one color to another one).
Once you have a jpeg image, the "lost informations" remain lost forever, so converting to tiff won't improve the result.
But, if you work on your image with a tool like Photoshop, you may introduce new information you want to keep. In this case, a tiff file will have more information than a jpeg one (always depending on the jpeg quality factor). With Photoshop, a jpeg quality of 8 seems to be considered a good value to have good results.
In any case, don't forget that lost details (with lower quality settings) will never come back.
For image quality settings consider :
- can you take new shots if needed ?
- what kind of photo it is ( action need short response time and saving big files on CF card can be long)
- the number of photos you have to take corresponding to the memory you have.
I suppose that your 700k images won't suffice for 8 X 10 prints, even 5 X 7 may be over the limits. I usually use the "Normal" settings of my CP5k that gives me images of 1.5 Mb (2560 X 1920).Some tests I've seen tends to prove that it should be preferable to use the "Hi" settings wich produce 3MB files (2560 X 1920). I suppose that the D1x have similar settings. The best is to try, and in case of doubt, higher the image quality and consider buying some more CF cards
Hope it helps
#2. "RE: Capture and saving images !!" | In response to Reply # 0AlanC Basic MemberMon 22-Jul-02 03:33 PM
It's usually best to have the camera compress the images as little as possible, so using JPEG Fine mode is preferable: that will give you better quality for your larger prints.
If you want the absolute best quality the camera is capable of then try using RAW mode - although you must have a copy of Nikon Capture, Nikon View, QImage or Bibble (the latter two are available as shareware trial versions) in order to process the NEF files the camera generates in this mode - they can't be opened directly by applications such as Photoshop.
Whichever mode you use it's always a good idea to write the files the camera generates to CD before you do any processing on them.
#3. "I'm using a D100 which is similar in image processing.." | In response to Reply # 0RRowlett Charter MemberMon 22-Jul-02 08:49 PM
...and while I strongly prefer the JPEG fine mode, the JPEG normal mode is not that much worse based on tests I have done. There are more compression artifacts in JPEG normal (1:12 compression) files compared to JPEG fine (1:6 compression) but you would normally have to look fairly closely, even at 8x12". At 4x6" you can get away with a lot more, and I wouldn't give it a second thought.
There is no reason to save your JPEGs in TIFF mode, as all that will do is increase file size. The compression algorithm has already been applied, so you can do no further damage by simply copying it to a CD-R. What you want to avoid is opening, editing, and resaving the edited image as a JPEG. So enjoy the file-size savings.
Considering you can easily get 150 JPEG fine images on a single CD-R, is there any particular reason why you are shooting at JPEG normal? Perhaps you have only one 256 Mbyte flash card? In that case, go directly to pcmall.com and take some of your earnings and purchase another card for under $100. The 256 Mbyte cards are now the cheapest storage per Mbyte in compact flash format right now. You should be able to get 75+ JPEG fine images per 256 Mbyte card.
#8. "RE: Capture and saving images !!" | In response to Reply # 0
Cleaning the CCD is a snap if you go by the Thom Hogan method.
Skip all of the other approaches using blowers and vacuums - they only work minimally (just my opinion, naturally).
Blown out whites and yellows. Some suggestions:
1) Don't have white or yellow in your photographs
2) Use a circular polarizer and/or neutral density filters
3) Use spot metering on the bright colors and experiment with
your exposure compensation settings
4) Shoot in NEF mode, then you can experiment in Nikon Capture
making corrections there
5) Use the highlight and histogram options in playback to guide you
6) Go to Photoshop, make a layer of the blown out areas and use a
little amount (about 30%) of the multiply filter
7) Go to some of the better photographers' web-sites and disregard
everything I've said here
Best of luck to you,