Carl D Loc: Albemarle, NC.

I agree 100%. Since I went with all Sony's with EVF I'll never go back to reflex types. I like the EVF for the reason you do, that is you can see your exposure before you take the shot. I also like using DMF with 5x turned on just in case I need it. Also use back button focus.

Hunakai

If I can't hold it to my eye, the left eye in my case, and see and compose as carefully as I have for 50+ years, the entire scene, then what is the purpose? An optical (ancient) viewfinder works in all light,in all conditions. Composing on a screen at near arm's length is foreign to any fundamental understanding of composition and involvement in a potential image, captured.

wdross Loc: Castle Rock, Colorado

As rjaywallace said, there are pluses and minuses. Some consider the loss of the optical viewfinder a minius, but I personally consider it a plus. Size and weight wise, I think you will find that the 4/3 rds size and weight a distinct advantage.

Al Freeedman

Lynda,

I agree with another, The Olympus OMD E M1 is a great camera. However there are three models in this series; OMDE-M5 and OMD EM 10 Mark !!. You can buy Olympus direct from Olympus.
The OMD E M 10 Mark 11 is a great buy and has just about every feature you'd ever want. You can even buy this camera referbished, an even better buy

Captain Al

Cdouthitt Loc: Traverse City, MI

Touch screen. Some don't like it...I for one wouldn't want to live without it. Been fully mirrorless since the fall of 2013 (Em1). Never going back to a DSLR (d stands for dinosaur in my book). For me it's more about the size of the gear. I can carry my em1 12-40, 75 and 7.5 in a small tamrac velocity 6 sling and shoot just about anything that life throws at me all day long with no issues. One thing that is true of all mirrorless cameras, is that you'll want to carry extra batteries with you. I have four total, and that'll provide enough juice for a full wedding shoot.

Jerrin1 Loc: Wolverhampton, England

I sold all my Canon APS-C gear because it was too heavy to lug around for up to 7 hours a day. I replaced it all with Olympus M43 - 2 x EM1 bodies and Olympus/Panasonic lenses. My system is easily carried over 15 miles now and I have the Olympus 300mm f4 PRO and PanaLeica 100 - 400mm lenses. I have, however, just bought a Nikon D500, Nikon 300mm PF VR and Nikon 1.4TC 111. This Nikon system is really lightweight and compliments my mirrorless system brilliantly well. I bought the Nikon for BIF as I was unable to match the amount of keepers I used to get with my Canon 7D mark 11. The D500 is incredible, but I also love my EM1's. Mine is a wildlife system so may not suit your type of photography.

janelux Loc: Florida

I made the switch from my heavy Canon 7D to a Sony A6300 and couldn't be happier in my decision. The Sony is amazing and does everything I want a camera to do and more. If you buy an adapter, you will be able to use your Nikon lenses, although if they are too heavy that defeats the reason for the switch. Big decision. My advice.....go to Best Buy or a camera store and hold and play with a mirrorless and see how you like it compared to your Nikon. Good luck!!!

mborn Loc: Massachusetts

Why don't you rent a mirrorless camera system and try it out Then make up your mind

Les White

I moved to Fuji over a year ago and have been pleased with all aspects of the camera and quality lenses--no regrets --excellent color quality, love the electronic viewfinder and more compact and lighter equipment a real plus--it ain't cheap though!

MtnMan Loc: ID

Look at the Nikon D5300. IMHO better than the D7100 and half the weight.

jerryc41 Loc: Catskill Mts of NY

I tried the Sony NEX 5 & 7 with an assortment of lenses, and I went back to my big Nikon DSLRs. Unless you're using a cellphone for photography, you still have to deal with a certain amount of size and weight. I prefer the controls, viewfinder and images from a DSLR.

Of course, going mirrorless will get you a lighter package, lenses included, so you have to look at reviews and comparisons and decide what's right for you. It's all a matter of becoming accustomed to the controls.

barkeypf Loc: Clifton Park, NY

If you don't mind the weight and size of the 7100 then keep it. I switched from a D5200, which I loved, to a Fuji X-T1. I have no regrets. You are on the right path with your mirrorless choices. An Olympus 4/3 would be the lightest due to lens size.

camerapapi Loc: Miami, Fl.

I am sure that your questions are going to trigger many different responses. I am going to give you mine for what it is worth.
For traveling or for everyday use when something light is desirable mirrorless cameras are very hard to beat. They offer great images with good lenses assuming good photographic techniques are used.
Although mirrorless cameras have come a long way they are not yet up to a dSLR standards in some areas like noise and AF performance for action.
I am not familiar with Sony mirrorless cameras. Some of them like the A7 series have full frames with excellent Karl Zeiss lenses but I do not know how well their AF performs when it comes to wildlife and action photography. It is my understanding that they do very well controlling noise at high ISO settings.
I am not familiar with Fuji but very familiar with Olympus. The Olympus cameras have been improving in quality and features. I do not know how good are their new cameras when it comes to noise and AF for action photography. I use the Olympus EP-5 mainly with a Zuiko 12-40 f2.8 Pro and I am very satisfied with the quality of the images.
If action and wildlife photography is a big part of what you do keep your Nikon. As a matter of fact, even if you buy a mirrorless camera I would recommend keeping the Nikon body.
I hope this helps.

amkras Loc: NY

Linda I also have The D7100 with 4 lens. After my last vacation, I vowed to go lighter and I did. I have the Sony a6300 and lens equivalent to my Nikon (except for a macro) and I could not be happier. I may sell the Nikon gear at some point but now I still use it form time to time. Plus I find the Sony so much easier to use. Good luck with your decision. I'm

Architect1776 Loc: In my mind

If you go mirrorless look at Fujifilm Pro x 2. It is well built, has good photos and I like the viewfinder being optical (Hybred actually) so you see what is going on in real time if you wish rather than the electronic delay. They have a good range of lenses and most other DSLR and SLR lenses can be adapted to it. Especially older legacy lenses like the FL and FD from Canon.
I rented one for a weekend and really enjoyed it.