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mr_marks

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Posts posted by mr_marks

    Initial AF Point in Canon 5D4

    in Canon EOS Mount

    Posted

    There are three options in this 5D4 menu i.e. Initial AF Point Selected, Manual AF Point, and Auto. I don't quite understand how the Manual AF Point works, and what it actually does. When I select this option, it does not look any different from the Initial AF Point Selected, at least from what I can see in the VF. Before I switched to AI Servo and Auto Selection AF, I manually selected Expand AF Area. When I get into AI Servo and Auto Selection AF (with Manual AF Point option), all I see is one AF point and this is no different from using the Initial AF Point Selected option. This does not make sense. I would appreciate an explanation on this.

    Question on image resolution in Photoshop

    in The Digital Darkroom: Process, Technique & Printing

    Posted

    <p>I am in the midst of preparing some artwork for publication. I saved an image in TIF format at 1200 dpi resolution. When I checked the resolution of the image by right clicking on it and selecting "properties", the horizontal and vertical resolution is at 1200 dpi. When I open the same image in photoshop and select image->image size, the resolution shown is only 300 ppi. Why is there is a difference? Thanks for any inputs in advance!</p>

    Questions on resizing raw images to jpg at 72 ppi

    in The Digital Darkroom: Process, Technique & Printing

    Posted

    <p>Dear Frode, thank you very much for your clear explanation! What I want to do is to publish my photos in Flickr with not too high a quality that will allow others to make high quality prints. <br>

    <br />I guess that there are two ways. One is to compressed the original by a certain factor so that it is more "pixelated". In the Image Processor, which Quality setting do you think will be safe?<br>

    The other way is to resize the images after conversion to jpg to a certain pixel width and height suitable for Flickr. Can you recommend what would be a safe the pixel width and height?<br>

    <br />Many thanks!</p>

     

    Questions on resizing raw images to jpg at 72 ppi

    in The Digital Darkroom: Process, Technique & Printing

    Posted

    <p>I am using Adobe Bridge to process my raw images and need to convert to jpg at 72 ppi.<br>

    I normally do a batch conversion to jpg using Tools->Photoshop->Image Processor and then set my Quality to 5 and also perform an action for watermark. <br>

    I found that if I open the jpg image in windows photo viewer or photoshop, the property of the image shows that it is 240 ppi, 3840x5760 pixels, 40.64x60.96 cm with a 1.56MB memory size. <br>

    I then tried to set the Quality in the Image Processor to values below 5, but then I am still getting the same jpg image properties i.e. 240 ppi, 3840x5760 pixels, 40.64x60.96 cm but the memory size is lower than 1.56MB.<br>

    Why isn't the ppi reducing with a lower Quality setting?<br>

    Thanks for any inputs and suggestions!</p>

    <p> </p>

    Permanent sensor dust spots - what is Canon's manufacturing specification?

    in Canon EOS Mount

    Posted

    <p>I had recently returned my 5D3 to Canon due to permanent sensor dust spots (8 spots) visible at f22 to f8. Canon service confirmed that the spots cannot be cleaned externally and were internal to the sensor. Canon replaced the sensor and upon receiving the 5D3 back, I was surprised that there was still one spot visible at f22 to f16. <br /><br />This makes me wonder what is Canon's manufacturing specification for dust spots on their sensor? I would think that the sensors are assembled under clean room environment and should have strict particle control.</p>

    Good ball head for Gitzo tripod

    in Accessories

    Posted

    <p>" I understood that Gitzo was the CF tripod of choice for many, but I couldn't find any objective reason why and I hate their leg locks. I asked questions on here and spent hours searching for any objective evidence to the extent that if I bought a Gitzo I'd get sharper pictures. I looked elsewhere on the internet with the same result. Everyone likes their Gitzos but no-one seemed able to give any objective evidence to support spending twice as much on a CF tripod than I needed. I bought the Manfrotto 055 model in carbon fibre instead for half the price of the equivalent Gitzo, and so far I'm happy with it. But for me, the place I didn't want to compromise was the head and plates. I bought RRS and as I've said I'm enjoying using it and I can see the benefit I get from it every time I use it. So for me I chose to compromise on the legs not the head and I still believe I'll get more benefit that way."<br>

    Dave H, what you said totally made sense to me. Thanks!</p>

    Artifact in RAW images when viewing with ACR

    in The Digital Darkroom: Process, Technique & Printing

    Posted

    <p>What I observe is that after editing in ACR and perhaps later in PS, then converting the file to jpeg, the artifact can be seen if the jpeg file is opened again in ACR or PS, but if I open the edited file in Microsoft Picture Manager, the artifact is completely gone. So, it could be some setting in ACR or PS that's affecting the displayed image, but I don't have any idea what could be causing it.</p>

    Artifact in RAW images when viewing with ACR

    in The Digital Darkroom: Process, Technique & Printing

    Posted

    <p>Hi, I often see some kind of artifact in the shadow region of RAW images when viewed ACR. When I view the same file in DPP, this artifact does not show up. I would like to understand why this artifact is showing up and if there's a way to eliminate it in ACR? In the example below, the artifact can be seen in the left side of the neck. The first image is from ACR, while the second from DPP. Thanks for the inputs!<br /><br />http://www.flickr.com/photos/marksmike/6907696385/<br /><br />http://www.flickr.com/photos/marksmike/6907695799/</p>

    ACR versus DPP processing for Canon CR2 raw files

    in The Digital Darkroom: Process, Technique & Printing

    Posted

    <p>Hi, I was doing a simple comparison between ACR (version 6.6) and DPP (version 3.11.4) and found that there are some slight differences in the processed image quality for CR2 raw files. I opened a CR2 file in ACR and DPP (without any adjustment done in both) and saved the file into jpg format. The converted files can be seen here (dpp first, acr second):<br /><br />http://farm8.staticflickr.com/7188/6902575655_276905da74_b.jpg<br />_MG_3078dpp by marksmike, on Flickr<br /><br />http://farm8.staticflickr.com/7060/6902581713_6aa837b445_b.jpg<br />_MG_3078acr by marksmike, on Flickr<br /><br />Then I cropped a small area out of the two photos for comparison (dpp first, acr second):<br /><br />http://farm8.staticflickr.com/7183/6902537877_d34b640246_b.jpg<br />dpp1 by marksmike, on Flickr<br /><br />http://farm8.staticflickr.com/7196/6902538291_937098bd5d_b.jpg<br />acr1 by marksmike, on Flickr<br /><br />The acr image seems to be more mottled while the dpp image is smoother. I would like to ask the following questions:<br />1) Is it better to do adjustments in DPP rather than ACR, or is there some setting I can optimize in ACR for CR2 raw files?<br />2) I prefer to work with ACR rather than DPP as ACR is more user friendly and offers more capabilities. What's your opinion on this?<br />Thanks for your inputs!</p>

    Thanks to Dust Aid great customer support!

    in Accessories

    Posted

    <p>I just wanted to mention a word of thanks to the really superb customer support from the Dust Aid team! The friendly and delightful customer support staff, Ms Andrea, really makes dealing with Dust Aid a pleasant experience. A big plus to their already strong product lineup. I am using the combination of Dust Aid's Platinum and Dust Wand (with Microcloth) with my Canon 5D2 with excellent results.</p>
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