BobT Loc: southern Minnesota

I've been asked to make a presentation of some of my recent photo trips. Having never done this before, my first question is about detail and sharpness. If I place all of my photos to be shown on a DVD, and project them onto a screen, will the quality get worse the larger that I blow them up? The pictures have been taken with 10, 16 & 20 megapixels. The last thing I want to convey is poor quality images to the group.
For what it's worth, I have made prints as large as 16 X 20 with fine sharpness and detail. But projected images will be much larger than this.
Thanks.

DWU2 Loc: Phoenix Arizona area

The quality will suffer a little, but, since you're projecting to a large screen, the audience will presumably be sitting farther away. Should work out fine.

Stardust Loc: Central Illinois

Obviously is dependent on quality of projector that is being used and how large of a screen projection. Common sense would be the larger the projection the blurry the photos (you are spreading a set number of pixels over a larger size area) however I have done 100s & 100s of PowerPoint presentations, including travel ones with lots of photos, many projected onto almost full movie theatre size screens, and the only one that noticed they were just slightly not as sharp was me. So if original is sharp I seriously doubt if you should have any worries whatsoever.

bsprague Loc: Lacey, WA, USA

You need to find out what is being used as the "large screen".

Current TVs, flat screens or projectors, come in two sizes now. HD and 4K. HD is 1920x1080 or about 2 megapixels. 4K is 3840x2160 or about 8 megapixels. Projectors or flat screens.

Most of the newer ones have USB ports for thumb drives ors hard disks. You control the slide show with the TV remote. If you put image files on a DVD, you add the unknown of the DVD player quality. If you "burn" a DVD it will have terrible old SD (standard definition) quality.

My personal best results are exporting "display" copies using Lightroom with pixel dimensions for the 3840x2160 screen. However, my Samsung 4K TV is pretty good at rendering any JPEGs of any size.

davidrb Loc: Half way there on the 45th Parallel

If your image has faults they will be magnified. Likewise for good composition and positive accents for your shots. Magnification will accentuate flaws, always does. If you are satisfied with the 16 x 20 you will like the larger prints. You might be surprised at what people do not see right in front of them. Relax and enjoy, and wait for the compliments to flow.

bjprovo Loc: Northeast CT

A typical DVD will show less detail than a BluRay DVD. So if there is BluRay capability you may want to look at getting a BluRay burner.
But the USB will hold the HD very nicely if that is a possibility. That has become my first choice for slideshows.

R.G. Loc: Scotland

Before you get carried away with sharpening, remember that any noise will become more noticeable on a larger screen. For an image that's even slightly noisy, that could be a more significant consideration than sharpness.

WB9DDF Loc: Knoxville, IL

Find out what the maximum resolution of the projector you will be using is.
Use that resolution.
Problem solved.

GED Loc: North central Pa

Bob I can offer what I do that works very well for presentations. I have a 10ft screen which I use for indoor programs, it is 16x9 ratio, I use a high quality Canon projector which I set to use 1920x1080 HD resolution. It is best to size your images to the native resolution of the projector for best reproduction. You did not say what ratio your screen is but most now are 16x9, if you size your images to the 1920x1080 they will be a perfect fit and fill the whole viewing area of the screen. This requires some cropping because in my case my camera has a 3x2 image ratio so I lose a little off the top or bottom,but I shoot with that in mind. Using that setup gives a tack sharp beautiful presentation which the viewers always comment on. The quality of the projector in terms of resolution, color saturation and reproduction, and lumens (brightness) is of paramount importance if you want the best reproduction of your photography. Also try to have control over the darkness in the room, any ambient light degrades your display by reducing contrast and washing out colors. Hope this is of help to you.

Stardust Loc: Central Illinois

Gotta love UHH... reminds me of the little boy who asks his mother where he came from? She thought "oh my, time to have the birds & bees talk". After an hour of explanation, she asks if he understood everything. His reply was "Not really. Sally next door came from Detroit, where did I come from?"

I see suggestions ranging from cropping all your photos to buying new equipment to updating to Blu-Ray, etc. Two good suggestions were put on a USB thumb drive if using their computer or directly on hard drive if using your laptop to plug into projector. Dim the room lights and present away - it will be great.

jim quist Loc: Missouri

My wife does regular presentations using an Epson projector. she projects the images on a wall, probably 10x8' with resolution I believe of 10mp, and they look great.

BebuLamar

When you said DVD you meant you play it on a DVD player or you use the DVD disc to store the images to be shown using the computer? If you are going to use the DVD player then the image quality is quite bad for still images as they are only 720x480. Your best and least expensive is to use a 4K TV of 60" or so. I think 4K projectors are quite expensive.

hobbit123 Loc: Brisbane, Australia

Couldn't have put it better myself

cdayton

I have done several presentations of travel photos using a video projector for large groups and had no issue with image quality for all the reasons already mentioned. Many of my pics were with a D300 (12mp), a D50 (6mp), a Coolpix 8700 (8mp), an earlier Minolta DiMAGE S404 (4mp) and even a little Casio (2mp). So relax.

johnst1001a Loc: West Chester, Ohio

If it is possible to show your pictures on a high resolution large TV, like 75 inch, do it. No projector on a white screen is a match for the quality of the TV in my mind. The other thing is lights. If you are in a room which is bright, or with daylight coming through the window, be prepared to be very disappointed, the pictures will appear washed out. We had a presentation just last night using an 81 inch Sony TV, 4K. The pictures were excellent, even with some daylight coming through the windows. Prior meetings at a different place, using a 4k projector, we were always complaining about the quality.