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#16 |
Nil adsuetudine maius
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Karma: 500000
Join Date: Nov 2019
Location: US
Device: PW4
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Okay you've won me over to your way of thinking.
No PDF can be reasonably viewed on anything but 50 lb, 8.5 x 11 acid-free vellum cross hatch paper illuminated by indirect sunlight. Palm fronds optional but a bowl of grapes must be available. |
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#17 |
Resident Curmudgeon
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Karma: 145864619
Join Date: Nov 2006
Location: Roslindale, Massachusetts
Device: Kobo Libra 2, Kobo Aura H2O, PRS-650, PRS-T1, nook STR, PW3
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But a scientific paper in PDF is not going to work well enough on any 6" eInk screen. I'm also thinking 7" may still be too small. Try an 8" screen with KOReader and see how it goes.
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#18 |
Wizard
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Karma: 45301087
Join Date: Sep 2012
Location: Ohio
Device: iPhone 13 Pro, iPad mini, iPad Pro 12.9",Paperwhite 6.8", Scribe 2022
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I have several PDFs that I refer to occasionally, a user manual for a car stereo for example. I put that PDF on my Oasis 2nd gen, with a 7" screen.
It doesn't look bad, and while not a terrible experience, the screen refresh every time you enlarge or pan the page, would be tough to take on a regular basis. Navigation was surprisingly snappy, but not something I'd want to do to read an entire book. I'm trying to upload a picture, but it's not working for me again. I get the Select Photo, hit upload, and the page goes blank. I have trouble off and on with uploading pictures here using my iPad. I've never been able to figure out why. Last edited by Deskisamess; 01-08-2020 at 09:28 AM. |
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#19 | |
Guru
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Karma: 8820388
Join Date: Dec 2008
Device: Sony PRS-505, -350; Kindle 3 3G, DX, PW 2; various tablets
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Quote:
I say "decent results" on a 6" reader because it's just on the cusp of comfortable readability for me. With a 7" Oasis, it should be considerably better. ============================================== EDIT: Ignore useless text hidden in spoiler below. The latest k2pdfopt supports the Oasis 2. Spoiler:
Last edited by jj2me; 01-08-2020 at 06:21 PM. Reason: Correcting mistake due to using old version of k2pdfopt. |
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#20 | |
Grand Sorcerer
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Karma: 103362673
Join Date: Apr 2011
Device: pb360
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Quote:
https://www.mobileread.com/forums/sh...d.php?t=144711 I am sure that he would be happy to add Oasis entries. Be sure to let hime know the Oasis 1 is 6" and the Oasis 2 and 3 are 7" and all are 300 DPI. |
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#21 | |
Guru
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Karma: 8820388
Join Date: Dec 2008
Device: Sony PRS-505, -350; Kindle 3 3G, DX, PW 2; various tablets
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Quote:
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#22 |
Guru
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Karma: 8820388
Join Date: Dec 2008
Device: Sony PRS-505, -350; Kindle 3 3G, DX, PW 2; various tablets
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Just tried k2pdfopt on my Oasis 2 using this PDF as input.
Selected Kindle Oasis 2 in upper right drop-down menu. Checkmarked in lower left of k2pdfopt: - Output in landscape - Native PDF output There were then these other checkmarked items that I didn't change: - Color output - Smart line breaks - Fast Preview First try with the above settings lost pages 1 and 2, and lost some text on the right, so I changed the default values that the "Kindle Oasis 2" selection gave me: - removed -cbox3- by editing Pages to convert - changed width to 5.5 inches instead of 5 inches [do this under Crop areas] These five Oasis 2 screens capture the first 2-1/2 pages of the PDF. Note that the pictures look very readable on most PC monitors because they display bigger in size than the actual Oasis 2. To get a more realistic idea of how readable it is, make the pictures smaller (e.g., "CTL -" several times in Windows browser) until they appear approximately the size of the actual Oasis 2. It's ok for my vision, just about the size I'd set if I could, though the super- and subscripts need decent ambient lighting, or more than my usual brightness setting of 8. Also, scrolling is so natural in landscape, just scroll up to see more, down to see previous. Just love k2pdfopt. Couldn't find a donate button on the k2pdfopt page. EDIT: Apologies, I just read more carefully and see that the technique (native PDF output) described in this post doesn't answer your stated problem: "the problem is that I can't highlight or use the dictionary or any other functions that allow you to interact with the text." Last edited by jj2me; 01-08-2020 at 08:26 PM. Reason: Admitting that I didn't address most of the question. |
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#23 |
Resident Curmudgeon
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Karma: 145864619
Join Date: Nov 2006
Location: Roslindale, Massachusetts
Device: Kobo Libra 2, Kobo Aura H2O, PRS-650, PRS-T1, nook STR, PW3
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But how good is the PDF when in portrait? For a scientific PDF, you do not want the any of the graphics to be split and you don't want to have to fiddle to try to see the entire image. If portrait isn't good enough, then a 7" screen isn't good enough.
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#24 |
Still reading
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Join Date: Jun 2017
Location: Ireland
Device: All 4 Kinds: epub eink, Kindle, android eink, NxtPaper
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I find most of my PDFs need 10". Some need larger to to be comfortable, like an external screen on laptop turned to Portrait. Years ago I did this with a 1600 x 1200 CRT, easier with an LCD monitor. Most OS can rotate the image on external screen, nearly for 20 years.
Certainly some work now on the 7" libra compared to 6" PW3. The 9.7" Kindle DXG was bought for PDFs and was useless because it was too slow and too low a resolution. There are essentially two main kinds of PDF: Ones that are primarily a scan (though there might be an OCR layer for search) and ones that are exports from wordprocessing or other publishing source. Since the idea of a page size and fix layout is inherent, and it's an envelope with instructions how to render identically on any printer the result of any PDF resizing, trimming or attempting to flow is variable from acceptable to disastrous. It's PURELY intended for transfer to paper and preview on a screen. It's not an ebook format. Thus I didn't bother spending €100 extra for an 8" Forma over a 7" Libra when updating from the original 6.8" Aura H2O to get better resolution and page turn buttons. The Libra does do scanned PDFs very much faster (the H2O too slow to use on some suitable to read), however even with trimming, processing etc most of my PDFs still can't be used on it. You need a decent 10" or ideally 13" to 14" tablet to manage all PDFs, ESPECIALLY scientific papers, Magazines and larger format text books. Zoom and Pan is very painful on a multicolumn 100 page magazine. You'd only look up a manual or datasheet with Pan & Zoom, not actually read loads of pages. Fortunately most of the thick operator manuals for small complicated gadgets with massively unituitive multilayer menus on small two line text displays are A5 size or less so work on the Aura H2O and now better on the Kobo Libra. A decent Lenovo 10" tablet cost me less than €120 just after Christmas and I'd already bought a 256 G micro SDXC for my 10" Windows 10 Atom tablet, which is garbage in comparison and was slower to turn PDF pages than the Libra! |
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