One has to wonder how he came to that conclusion. Seems you would actually have to try all the cameras before relying on that.
Perhaps it would be better to try the camera in question before making that broad of a generalization. Changes in sensors and support firmware can have a big impact on these kinds of things. Not to mention design goals of a particular camera. It is much like saying all lenses are sharpest at 2 stops from wide open. We know that isn't accurate because lens designs and goals affect that. -- Sent from my Android phone with K-9 Mail. "Steven Desjardins" <drd1...@gmail.com> wrote: >Sorry. The sentence should have read: > >Interesting that Boris suggests that a good rule of thumb is two EV >down from the max ISO. > >Oy. > >On Wed, Sep 1, 2010 at 2:17 PM, Steven Desjardins <drd1...@gmail.com> wrote: >> Yes, I remember Tri-X at ISO 400. All I could afford as a 15 year old >> kid and I developed it all myself. Interesting that Boris suggest >> that a good rule of thumb is EV down from the max ISO. So that puts >> the K7 at 1600 and the Kx at 3200. I found an interesting article at >> http://www.imaging-resource.com/PRODS/K7/K7A.HTM . It's a K7 review >> but has many samples of images at high iso on different cameras, one >> of which was the E-P1. It appears that the E-P1 has better high ISO >> detailing than the K7, although a lot of this is judgement. >> >> On Wed, Sep 1, 2010 at 11:16 AM, Paul Sorenson <allarou...@earthlink.net> >> wrote: >>> It is kind of mind boggling. When I got my first SLR in the early 1960s >>> High Speed Ektachrome, at ASA 160, was a big step up in speed. :-) >>> >>> On 9/1/2010 9:53 AM, Steven Desjardins wrote: >>>> >>>> I freely admit that I don't think I am really understanding the >>>> implications of ISO 12,800. It's like a person being 20 ft. tall. >>>> My mind has trouble associating that number with that property. I >>>> noticed that one high end Nikon had a max sensitivity of 102,400. >>>> That's like trying to grasp an f0.1 aperture. It makes mathematical >>>> sense in terms of EVs but I never thought I would see such a thing. >>>> >>>> On Wed, Sep 1, 2010 at 12:25 AM, Paul Sorenson<allarou...@earthlink.net> >>>> wrote: >>>>> >>>>> Here's another K-X example if you need low light capabilities. Pretty >>>>> much >>>>> a straight import into LR3 - at ISO 12,800. The noise isn't >>>>> objectionable >>>>> at normal viewing. (K-X, fa80-...@320mm,1/1...@f5.6) >>>>> >>>>> http://www.studio1941.com/photos/content/IMGP0631_large.html >>>>> >>>>> -p >>>>> >>>>> On 8/31/2010 1:34 PM, Bruce Dayton wrote: >>>>>> >>>>>> One big difference for me was that with the K20 and earlier I really had >>>>>> to have good conditions (lighting, processing, etc) to make a high >>>>>> ISO shot reasonable. For instance, when shooting weddings I could >>>>>> take a couple of shots with the 50/1.4 lens close to wide open and no >>>>>> flash, then process to remove ugly color cast and grain, etc. The >>>>>> resulting image would possibly even need to be turned to B&W. >>>>>> Basically, this meant that the shot was not the norm, but the >>>>>> exception. >>>>>> >>>>>> With the K-x, it is totally changed. Straight out of the camera, ISO >>>>>> 6400 is looking quite good - no extra work. So now I have shot >>>>>> entire receptions with no flash and no heavy post processing. Even >>>>>> more so, simple snaps of the family in situations where I would have >>>>>> used a flash in the past, I no longer need to. Gathered around the >>>>>> dinner table talking in the evening or playing a game or one of the >>>>>> kids receiving an award at school, etc. The ability to shoot >>>>>> consistently at high ISO (1600+) is a real game changer. >>>>>> >>>>>> ISO 6400, 85mm Soft Focus lens, no post processing, shot right after >>>>>> dinner: >>>>>> http://www.daytonphoto.com/PAW/imgp1200-1.htm >>>>>> >>>>>> I would never have thought to take that kind of shot in the past. >>>>>> >>>>>> >>>>>> That is why I am saying to try the K-x and really see how different >>>>>> you start shooting and thinking. When I got mine, it was only to >>>>>> shoot a gymnastics sporting event - that covered the cost for me. It >>>>>> turned out to be just the tip of the iceberg. >>>>>> >>>>>> Here is a shot from a reception - fairly dim lighting - ISO 6400 - >>>>>> pretty much no post processing: >>>>>> http://www.daytonphoto.com/PAW/hoffman_00295.htm >>>>>> >>>>>> With flash, the shot would not be the same. This is the kind of >>>>>> thing I am talking about. Not really thinking about how you shoot >>>>>> today, but really thinking outside of the box. For me, the K-x was >>>>>> really a game changer in thought process and fun. Prior to that, >>>>>> pretty much the old thought process all the way back into my film >>>>>> days. >>>>>> >>>>>> "If you always do what you've always done, you'll always get what >>>>>> you've always got." >>>>>> >>>>>> Time to change it up and see what this Brave New World is offering. >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> No virus found in this incoming message. >>>>>> Checked by AVG - www.avg.com >>>>>> Version: 9.0.851 / Virus Database: 271.1.1/3104 - Release Date: 08/31/10 >>>>>> 01:34:00 >>>>>> >>>>> >>>>> -- >>>>> PDML Pentax-Discuss Mail List >>>>> PDML@pdml.net >>>>> http://pdml.net/mailman/listinfo/pdml_pdml.net >>>>> to UNSUBSCRIBE from the PDML, please visit the link directly above and >>>>> follow the directions. >>>>> >>>> >>>> >>>> >>>> >>>> No virus found in this incoming message. >>>> Checked by AVG - www.avg.com >>>> Version: 9.0.851 / Virus Database: 271.1.1/3106 - Release Date: 09/01/10 >>>> 01:34:00 >>>> >>> >>> >>> -- >>> PDML Pentax-Discuss Mail List >>> PDML@pdml.net >>> http://pdml.net/mailman/listinfo/pdml_pdml.net >>> to UNSUBSCRIBE from the PDML, please visit the link directly above and >>> follow the directions. >>> >> >> >> >> -- >> Steve Desjardins >> > > > >-- >Steve Desjardins > >-- >PDML Pentax-Discuss Mail List >PDML@pdml.net >http://pdml.net/mailman/listinfo/pdml_pdml.net >to UNSUBSCRIBE from the PDML, please visit the link directly above and follow >the directions. > -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
