fostertom Posted March 18, 2016 Share Posted March 18, 2016 Can anyone recomend any from-basics instruction about Perspective, Camera etc in 3D CAD? - articles, videos, books Quote Link to comment Share on other sites More sharing options...
ReMark Posted March 18, 2016 Share Posted March 18, 2016 AutoCAD 2009? This book might have what you are looking for. http://www.wiley.com/WileyCDA/WileyTitle/productCd-0470260580.html Quote Link to comment Share on other sites More sharing options...
fostertom Posted March 18, 2016 Author Share Posted March 18, 2016 Damn, I had that from a charity shop but gave it back, seemed so useless - but prob wd have been ideal for this! Quote Link to comment Share on other sites More sharing options...
ReMark Posted March 18, 2016 Share Posted March 18, 2016 (edited) Well I'm not 100% sure because my copy (2009 version) is in work so I won't be able to check it until Monday. Edited March 23, 2016 by ReMark Corrected version from 2010 to 2009 Quote Link to comment Share on other sites More sharing options...
fostertom Posted March 18, 2016 Author Share Posted March 18, 2016 Trying to match camera position with the view of an actual photo I took, so I can maybe superimpose my model on the photo. Camera xyz is no problem, but lens focal length? (it was a zoom camera). In the photo jpg's Properties, I see in its EXIF data that focal length was 9mm - which in my book is extreme fish-eye - and that's how the model looks when 9mm is dialled into Brics (Acad clone) Camera. So I'm wondering - is Brics Camera expecting a focal length figure as if the camera was a traditional 35mm? If so, I'd say the pic was taken at zoom of somewhere between 35-50mm FL, by 35mm standards, not 9mm. Anyone know how to convert this particular camera's FL data to 35mm equivalent? Quote Link to comment Share on other sites More sharing options...
fostertom Posted March 18, 2016 Author Share Posted March 18, 2016 Ok, I got zoom/FL answer, thanks to http://www.dpreview.com/forums/thread/3980603#forum-post-57461993 . http://www.digicamdb.com/specs/panasonic_lumix-dmc-f3 says the Pana has a massive 7.6mm sensor diagonal. http://photoseek.com/2013/compare-digital-camera-sensor-sizes-full-frame-35mm-aps-c-micro-four-thirds-1-inch-type throws more light. The diagonal of 24x36 is 43.3mm. So crop ratio is 43.3/7.6 = 5.69. 5.69 x 9mm FL gives 51.2 equiv FL for my pic - about right I'd say. Quote Link to comment Share on other sites More sharing options...
ReMark Posted March 18, 2016 Share Posted March 18, 2016 And that folks concludes today's photography lesson re: focal length equivalents. Please join us again next week when we'll discuss "f-stops"...fact vs. fiction. Thanks for joining us. Quote Link to comment Share on other sites More sharing options...
fostertom Posted March 18, 2016 Author Share Posted March 18, 2016 Glad to have brought it up - Wurrghh Quote Link to comment Share on other sites More sharing options...
ReMark Posted March 23, 2016 Share Posted March 23, 2016 You're in luck. I happen to have the 2009 version of the book I mentioned previously. Chapter 17 - Rendering & Materials Major topics covered include... -Creating Cameras to Reproduce Views -Creating a Lighting Scheme -Adding Materials Quote Link to comment Share on other sites More sharing options...
fostertom Posted March 23, 2016 Author Share Posted March 23, 2016 Sounds ideal - I'll get it, or a later version - am finding out which Acad version BricsCAD is like, in that department. Quote Link to comment Share on other sites More sharing options...
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