john_baum1

I fell for a USB microscope that appears to be like all the others. The focus control is very stiff and hard to adjust. The optics are minimal and have no depth of field. I inherited a 50+ year old Prior positioning device which I've adapted to allow me to move the 'microscope' precisely in three directions. In the X-Y plane I can find the object and with the Z direction (up/down) I can focus constrained by the cheap optics. The LED lights flicker with every adjustment. I am an amateur, not a professional. I am long retired. I have a limited budget. Perhaps it is not consistent with a market which is filled with useless junk and/or expensive research tools with nothing in the middle ground. If you've found something, please let me know. thanks baumgrenze

I have a Rollei P11 that I soon want to sell. I need help describing the slide trays. I have 2 sizes of slide tray or magazine. One is 4x4 cm (I remember these as made for 35mm slides and mounted they fit) and 6x6 cm (I'm unclear what size to call this one.) The larger one was made by Rollei and carries DBP 1033928. Searching this part number turns up no useful hits. The smaller ones are Leitz or Bauer/Leitz and carry no number. The last page of the manual describes projecting 12x17 mm, 24x36 mm, 4x4 cm, and 6x6 cm (which I believe matches the Hasselblad 2-1/4 mounted slide.) I can project a slide without difficulty manually, but the mechanical transport mechanism and the remote focus don't work any more. I understand that this is because rubber parts have hardened. How much should I discount my projector to allow an interested buyer to professionally restore it to 'good working order?' I trust there are still technicians in shops who can do such work. thanks baumgrenze

Thanks for the input.

I have a functioning 19" Dell P990 Trinitron CRT monitor that needs a new home. I plan to post it on the SFBay craigslist. I would like to price it so that I neither I nor the purchaser is exploited. Can anyone offer me a sense of what is a fair price? I'm selling because I have retinal issues and can no longer appreciate the subtlety of the monitor's quality image. thanks John

<p>I am running Win 7 Pro x65. I do not have iTunes installed on my desktop; it resides only on the iPhone.<br> Last Tuesday I used a USB port to recharge my iPhone 5. I knew there were no new images on the phone. I was asked by the phone if I trusted by desktop (part of the standard process when downloading photos) and said yes. I charged the phone for about 45 minutes. Later I used ZTree to search for an image and was amazed to discover that about 3,500 jpg and png files all had their 'last modified' dates changed while the iPhone was attached.<br> I know that modifying a JPEG file degrades its quality. What is the likelihood that the "mass modification" of these files as reported in the changed "Last Modified" date degraded them?<br> I have backups for most of these images. If I restore them with their correct dates, has anyone any idea how to prevent this happening again.<br> thanks<br> baumgrenze</p> <p> </p>