How to trigger Britek PS-300H Studio Flash with Nikon D40 via sync cord?

I am using a Nikon D40 camera (with AS10 type flash adapter) to trigger my Britek PS-300 Studio Flash via a sync cord. When it is on manual the flash is not triggered. However, when the camera is placed on automatic the flash goes off every time. I try to shoot the cameras with the "pop up" down but after shooting a few photos it pops up (by itself) although the flash adapter and sync cord is connected.
How do I get the Britek PS-300H studio flash to fire every time on manual. I use camera settings of: 640 f5.6 and iso Auto. I tried several combinations of camera settings but none worked consistently well.

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What Dslr to upgrade to from a sony a230?

I'm going to be graduating soon and i will be gettin about $500 or more and i plan on selling my sony a230 so i can upgrade my camera. I want to upgrade because of its size, battery, and some other things. I am leaning more towards a Canon or Nikon because i have owned a pentax and didn't find it very suiting. I tried out my uncles Canon EOS rebel (forget which one) and really liked it, having a button for each thing was very handy too instead of scrolling through a menu.

Any ideas as to what might suit me best
my price range is about 500-700 but a cheaper camera with more lenses will work too
(yes i know i'm picky)
Added (1). That is just what i know i will have, i will most likely have more just from some other things

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Nikon d3200 can't change f-stop?!

I'm a beginner in photography and just moving up to manual mode, and I understand how to shoot in manual mode. However I am not able to change my f-stop. I hold the button and turn the dial but nothing changes. Can someone help me here? This is all I get.

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Nikon D3200: which lens?

Nikon D3200: which lens?
Added (1). So I was planning on getting the Nikon D3200 with a 18-55mm VR II lens, my first ever DSLR,
but now I'm pondering whether I should get the D3200 with the standard kit lens for 360 euros, or look for an alternative. Will I be satisfied with the kit lens (Can it go really sharp?) and could I just drop the pics into lightroom (any examples of great unedited kit lens photos taken with the D3200 would be welcome), or should I get a 35mm, or 18-200mm, etc., pushing my budget beyond its original limit?

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Nikon d50 is an dslr or slr?

Nikon d50 is an dslr or slr?

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Good affordable DSLR cameras with a flip out screen?

I'm i the market to buy a new DSLR because mine recently broke. My only 2 requirements in that it needs to be under $400 and I would like for it to have a flip out screen, if not it's ok. Any brand is fine but I prefer Canon or nikon. Thanks in advance!

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Which camera to buy: Canon EOS 1200D DSLR or Sony Alpha3000(A3000) Mirrorless?

I have a set budget and confused which one to go for. I am a photography enthusiast and need the camera for personal reasons, not proffesional photography

I am a die-hard Canon fan, I have used cheap digicams from Canon that has taken excellent shots, I have tried Nikon and Fujifilm cameras too but both have really bad quality, I really think Canon is the best

however I have recently noticed Sony mirrorless cameras are capable of taking excellent,HD quality pictures

recently a friend of mine got the Alpha3000 and her pictures are just out of the world quality such clarity,detail excellent pictures

keep in mind this friend is a begineer and has in the past taken shitty pics with nikon camera so it is surely the camera that is good and not the photographer, she is an amateur begineer,more so than me

however the sony is a mirrorless camera, and I want a proper DSLR, the 1200D is an entry level DSLR but still a DSLR means many features and options to work your skills

Currently I do not have budget for more high end DSLRs

Please suggest
Added (1). also both camera have a 18-55 mm lense, however I can buy any canon lense in the future and use with the EOS1200D, with sony I am struck with one lense forever

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How to get sharp photos?

I am trying very hard to get sharp photos. I guess you can look at my deviant art page for some of my photographs http://thedotisagenius.deviantart.com/

When I go out to shoot photographs I come home with a photograph that gets worse in guilty the further I zoom in.

I want to be able to print the photographs to hang on the wall. A decent sized poster for somebody to have on their wall at least.

I have a Sony A6000 if this helps with a power zoom kit letns 16-55 that came with the camera
I also have a Nikon D5000. Also kit lens 18-55.

Thank you for the help.

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Help about the Sigma 30mm 1.4 lens?!

So I really want to buy the sigma lens, but buying it new is way too pricey for me so I'm looking on eBay. I'm confused though that there are different versions of the sigma lens. For ex: DC vs DG and lens made for NIKON or Canon or Sigma.

I have a canon t3i and I'm trying to figure out what versions of the sigma lens will work.

Please help:)
Added (1). the one I'm really wondering about is called: SIGMA 30mm F1.4 EX DC HSM For SIGMA AF +++NEAR MINT in BOX+++From JAPAN #258

would this work for the canon t3i, or just for Sigma cameras?

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Nissin Di622 with Nikon D3000?

How do i get my Nissin Di622 to work off camera with my Nikon D3000? It says it should work but it doesn't want to work i don't understand why, if anyone knows any help would be greatly appreciated
Added (1). Sorry i do mean the optical slave is not working

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