Minolta DiMAGE 7i Review
RAW image format
RAW is simply pixel data as it comes directly off the CCD, no in-camera processing is performed. Typically this data is 8, 10 or 12 bits per pixel. The advantage being that file sizes are considerably smaller than an equivalent TIFF file. The image has not been processed or white balanced which means you can correct the image, and it's a better representation of the "digital negative" captured. The disadvantage is you can't open these image files with a normal photo package, in the case of Minolta RAW files (.MRW) you must use the Minolta DiMAGE Viewer.
A little background: each pixel of a CCD can only see one colour, depending on the CFA (colour filter array) placed over the CCD this is either Red/Green/Blue or Cyan/Magenta/Green/Yellow. The cameras internal image processing engine then interpolates colours from the value of neighbouring pixels to calculate a full 24-bit colour for each pixel.
What's slightly odd about Minolta's MRW format are the size of the image files. The DiMAGE 7i uses the Sony ICX 282 CCD sensor which outputs 2588 x 1960 effective pixels (some are lost in the de-mosaic process). Minolta report the camera has having a 12-bit A/D converter. Thus MRW RAW files should be approximately 7,430 KB (less header). However, MRW files come out of the camera approximately 30% larger at 9,741 KB. I have no idea where this extra overhead comes from but it does slightly reduce the usefulness of Minolta's RAW format.
Minolta DiMAGE Viewer
DiMAGE Viewer is the supplied image browsing / conversion application. It allows you to browse, view and organize images from the camera. It also provides the ability to convert RAW files (.MRW extension) to JPEG, TIFF or BMP. Double-click on a MRW file in the DiMAGE Viewer browser window and you will see the options dialog shown below.
This RAW file dialog allows you to change any of the following parameters:
- Color Mode (Color / B&W)
- White Balance (Camera, Daylight, Cloudy, Tungsten, Fluorescent, Manual from image, Kelvin temp)
- Filter (-3 to +3)
- Saturation (-3 to +3)
- Contrast (-3 to +3)
- Sharpness (Soft, Normal, Hard)
The only setting we normally see which is unfortunately missing is digital exposure compensation, it would be nice to have this option because it is one of the most useful features of RAW files. A group of settings can be saved as a 'RAW Job' and retrieved later when converting another image.
RAW vs. JPEG (Scene)
|RAW (.MRW) (click below for re-saved JPEG)||JPEG FINE (.JPG)|
RAW vs. JPEG (Resolution)
|RAW (.MRW)||JPEG FINE (.JPG)|
Although the RAW resolution chart does look a little better than the JPEG version (less moiré, less sharpening artifacts) a closer inspection shows that DiMAGE Viewer's Bayer interpolation algorithm is introducing some very strange dot artifacts along diagonals:
These are also visible in the scene shot from above:
|Montréal Dépaneur Out of Business DP by MarioSS|
from Your City - Out of Business
|Wish You Were Here by Dutch Newchurch|
from Street musician playing
|Flight of a Puffin by cjf2|
Super macro photographer Can Truncer captured these incredible close-ups of a single peacock feather using a special setup and three different microscope lenses.
After successfully crowdfunding the Biotar 75mm F1.5, Oprema Jena is at it again. This time they're bringing back the Biotar 58mm F2: the world's only lens with a 17-blade aperture.
Adobe's move to a subscription model is treating it very well indeed. The company has posted record revenue for the second quarter in a row, hauling in a mind-boggling $1.84 billion.
More details have emerged about the potential sale of Blackstone's 45% stake in iconic camera brand Leica.
Popular mobile editing app Snapseed just got a major update that includes a new interface and 11 new presets for both Android and iOS, as well as adding the Perspective tool to the iOS version.
It might sound like a strange idea, but taking macro photos of boiling water can actually result in some really cool photographs. A good photo experiment for a rainy day.
The database was created to "break with the narrow lens through which history… has been recorded" by equipping those who commission photography with "the resources to discover photographers of color available for assignments.
Lensbaby has released two new optics for their special "optic swap system." The Lensbaby Sweet 80 Optic gives you that trademark sweet spot of focus, while the Creative Bokeh optic gives you 9 different drop in aperture plate options to play with.
TechCrunch has already posted their review of the upcoming iPhone 8 (not yet the iPhone X), and they're calling it "a look into the augmented future of photography."
Affinity Photo is a $50 photo editing software with no subscriptions. That's it – pay for it once and you're done. And we think it's actually pretty darn good.
Instagram is currently testing a major change to the app's profile layout: replacing the 3-photo across grid with a 4-photo grid... and some users are NOT taking the news well.
A report by USSRPhoto is shedding some light on the return of the famed Zenit camera brand. It seems the full-frame mirrorless camera they're working on will be made in part by Leica using components from the Leica SL.
According to a reliable Korean report, Samsung is developing a smartphone sensor that's capable of super slow motion. Translation: Samsung's next batch of Galaxy smartphones may be able to shoot 1,000fps.
This simple photograph of a seahorse and Q-tip has taken the internet by storm. We spoke to photographer Justin Hofman about how it was captured, and what it means to him.
After a massive leak last week, Profoto has officially debuted the Profoto A1: the company's first on-camera flash system that they're calling "the world's smallest studio flash."
"When the first hyperfocal distance charts were designed, someone decided that an acceptably sharp background contained some blur — enough to notice in a medium-sized print [...] After that point, nearly every other hyperfocal chart followed suit."
The Canon EOS Rebel SL2 (also known as the EOS 200D) is the company's impressively compact entry-level DSLR. Packing a 24MP APS-C sensor, DIGIC 7 processor and Dual Pixel AF, it promises a lot of bang for the buck. And while not mind-blowing, it handles most tasks very well.
Correct these four common composition mistakes and your photos will be more balanced, tell a better story, and lead your viewer's eye where you want it to go.
The rugged, compact 360° action camera Kodak unveiled at Photokina in 2016, the Kodak PixPro Orbit 360, is finally available in the United States.
iOS 11 launches tomorrow, and it'll save all of your pictures in a new high efficiency image format called HEIC. Fortunately, there's now a converter that will let you turn those photos back into JPEGs.
Photo protection company ImageRights recently released a new service that lets non-subscribers take advantage of their streamlined copyright registration system that checks for errors and fills out all the required forms for you.
What's the difference between a $200 circular polarizing filter and a $100 circular polarizing filter? Roger Cicala at Lens Rentals put six different filters through a few tests to find out.
A flurry of leaks reveal that GoPro's upcoming Hero6 will shoot 4K at 60fps, 1080p at 240fps, will cost $500, and is scheduled for announcement/release on September 28th.
Before he became the iconic director whose name we've all heard, a teenage Stanley Kubrick struck up a business relationship with New York’s Look magazine. No surprise: he was an incredibly talented photographer.
WD's new G-Technology G-Drive mobile SSD R-Series is a portable solid state option for photographers who want the reliability of an SSD in a rugged water and dust-resistant package.
Fast, stabilized and affordable is an appealing combination when it comes to lenses. With its latest 24-70mm F2.8, Tamron aims to upgrade autofocus speed and stabilization. We've got a full gallery from this updated full-frame zoom.
Photographer Clay Cook tells the story of his most ambitious photographic dream and career goal coming true: photographing A-list actress Jennifer Lawrence.
In an interview with a Chinese website, Nikon Japan's Director of Development dropped a bombshell, saying that a Nikon mirrorless camera "must be full-frame."
Here's a side-by-side spec comparison of two flagship devices with particular attention to the things that really matter – at least to people who prioritize photography features.
A month and a half after revealing the finalists of the 2017 EyeEm Awards, the photo sharing community and licensing marketplace has finally revealed the winners.