Brian

It's 100% caused by the lens. CA happens when the lens is unable to focus the all different wavelengths of light on the image sensor at the same time. As the light enters the lens, it is bent slightly, and this phenomenon is known as dispersion. Lenses typically are designed to counteract this problem, with usually the more expensive lenses having better glass yielding the best results. That said, this is not a hard and fast rule. Even $2000 lenses can suffer from CA. CA is mostly caused by high contrast-swing situations. Tree branches against a bright sky, dark rocks against white snow, etc. Where CA happens the most is towards the edges of the lens. So the center part of the lens will have less CA, compared to the outer rim. This means subject placement is key. If you frame your scene with your subject in one of the corners, and it's a high contrast situation, you might have CA issues around the subject. Or your subject could be dead-center and be fine, but the damn tree line in the upper left corner could have all sorts of purple fringes.

But I would still get the 100mm f/2.0 lens over a Canon 85 1.8 ANY DAY.

I'm the same way. I can not stand Canon's Menu System, nor the feel of their cameras. Since optically the 85mm is 85mm and 50mm is 50mm, you'll get more compression due to the longer focal length, which is more flattering for portraits. The angle of view change happens at the sensor.

Seems like an average price. I don't see what Motherboard they are using, but it's more than fine for photo editing. You might want to just get extra RAM and bump it up to 32GB.

Well, her question implied viewing Raw files in the Windows Explorer. With XP, her D750's files won't read. If she wants to cull files outside of Bridge, she will need Windows 7 at the very least or a program like Bridgestone. But I'm not sure Bridgestone works on XP at this point. So my remarks stand. She should start putting money aside for a new PC. Does she need it now? No. There are work-arounds. That said, as much as I loved XP, things will start being more difficult as time goes on. I can imagine a future edition of PS not being compatible with Win XP. Especially if Adobe changes the programming language like they did with the Mac versions.

Windows XP is no longer supported and the Raw Codec that works with XP is also not being updated. (So you can view the image files in the Windows Explorer.) At this point, I'd start saving up for a Windows 10 machine. Windows 7's days are numbered. I think support for Win 7 ends in 2020.

Seems OK Spec-wise. Where do you take it when things break? I've never heard of that brand.

While there are many to choose from in the US, I'm not familiar with ones in the UK or Australia. Can anyone recommend reputable data recovery places in their part of the world?

Wow. I remember the Mac LC it reminded me of a Pizza Box. And the Mac SE. And the Mac 128. i don't know of any in the UK. I usually recommend Gillware for data recovery. Gillware.com i also found this one that seems to specialize in Mac Data recovery: https://www.securedatarecovery.com/services/apple-mac-recovery

This whole situation isn't good. Sounds like the motherboard or even the HD has failed. Professional data recovery is not cheap. Like kiss that new MacBook goodbye not cheap. Now splitting the partitions, one for programs, one for data is great for the technical types, not for the average person who hates technology. They will want to dump everything to one partition, no matter what they are instructed to do. Side note: This is why I answer some questions the way that I do. It's for the majority and the folks who really aren't tech-savvy. I'm sure there are plenty of members who are screaming at the keyboard on a normal basis. There is a method to my madness, but I'm digressing here... OK: The old MacBook isn't worth repairing. I'd get a new one and purchase a SATA to USB adapter cable. Basically, you will turn that internal drive into an external. These adapters should be between £10-£20. Maybe as much as £30. You can get them on Amazon. I'm hoping the HD with the data can be accessed with the new Mac. It won't be read on a Windows machine, you'll need a Mac.

Try to find a local authorized Apple repair shop. They might be easier to work with. You could also try calling Apple and see if they have any suggestions.

Yeah, it could be that your user ID is corrupted. Try creating a new one and see if that works better for you. You really should close out your programs once you are done. Bouncing back and forth between profiles with stuff left open is just asking for trouble. Of course, occasionally is fine, it's just not good computing habits in my humble opinion. Edit: The more I think about this, the more I feel you have corrupted software / profiles. I would seriously start backing up everything, including Actions and Brushes, just in case if things go horribly wrong. Corrupted profiles aren't any fun. ESPECIALLY if your profile is linked up to an iCloud account on Apple's servers. I just don't think that there is an easy way out of this, you might have to schedule an appointment with the Genius Bar or wipe the computer and start over to get things really fixed.

No, the USB ports on the display are just pass-thru ports, they don't transmit video. You are actually at a good point for us to get you straightened out. Here is what you need to do: Remove the VGA cable. Either purchase this 3 Foot Micro HDMI to DVI cable or this 6 Foot Micro HDMI to DVI cable. Hook one end into the laptop, and the other end into the big white port that is next to the VGA port on your Dell Display. That's all you need to do. In fact, the image on the display will be better. VGA was only meant for CRT (Tube) Displays up to 20". It's not meant for today's fancy flatscreens. In fact, they are really being phased out now and I don't expect to see VGA ports on anything within the next 5 years.

Yep. I second using VLC.

Which Dell Screen did you get? Don't buy anything until I know what you have.

Does your screen have any other ports besides VGA? It's really better to use a digital port such as HDMI, DVI-D or DisplayPort. VGA has been around since the late 1980's and is being phased out. Plus, colors are better, contrast is better, and things look sharper with a digital port. To answer your question, Cable Matters usually makes good stuff: http://www.amazon.com/gp/aw/d/B00879EZJI/ref=mp_s_a_1_2?qid=1456610108&sr=8-2&pi=SY200_QL40&keywords=micro+hdmi+to+vga&dpPl=1&dpID=41JxWvqGEgL&ref=plSrch

You are already on El Capitan. If there is an update for it, I'd install it. But since it's working, you might want to leave things alone.

Your resolution is probably set too high. What is it currently?

Please buy this Acratech Viewing Gauge for $14.95. http://www.bhphotovideo.com/c/product/650472-REG ----- Here is how you use it.

Just think, that support call just paid for itself. Glad you got it working.

IPS screens give better viewing angles and are more consistent color wise from edge to edge. But you still have the angle problem that you are describing. That's why I don't recommend laptops for photo-editing. But people are so damn determined to use a laptop, and I've given up trying to persuade people...it's a waste of time and energy. Its better to use an external display, which will remain at a single viewing angle, and be in an environment that has consistent ambient light. Basically, you turn your laptop into a desktop.

So you are getting a un-mount chime when you play videos off your internal drive? I'm confused.

Oh no! That was a bad choice. El Capitan has way more issues than Yosemite. Hopefully your problems will be minor, but I think you are going to hate life right now. No, you can't go back to Yosemite.

I'm going to have to troubleshoot this when I get home to my Mac. @Christina Keddie, could you lend a hand?

Hmm. Are you using a USB Hub? Does it have its own power?