I am by no means a technical expert when it comes to using flash equipment but I figured I'd give somewhat of a review of my likes and dislikes of this flash after using it for just a week. I have shot macro heavily for the last six years but still do not consider myself to be overly qualified to give a professional review of this product so take that for what it is worth. I may attempt to add a better review under the third party flash section in the future.
After reading glowing reviews of the Venus Optics 60mm macro lens, I figured I'd buy and try out their twin arm flash.
I initially freaked out a bit after receiving it due to how cheap and light it felt. Also freaked a bit in seeing that the flash unit said KR-800 rather than the KX-800 I ordered. I guess Venus Optics immediately beefed up the articulating arms after launch but have yet to change the model naming on the box or on the unit itself. So I am guessing that I am using the KX but am not entirely sure at the moment.
When first moving the flash arms the plastic on plastic articulating joints from the base of the unit on up to the flash heads would squeak with a sound that makes you wonder, "is this going to loosen up? How much do I want it to loosen up? Am I going to have another problem with keeping my lighting where I want it or am I going to fight sagging arms in the future? What kind of cheap plastic was used to make this?" Rather than pay to send it back, I decided to give it a try while being gentle in manipulating it.
The flash was fairly easy to figure out. Normally I would read the instructions that came with a newly purchased product but the instruction booklet that arrived with this flash was entirely in Chinese.
Having fought flash bracket articulating arms in the past when using the overpriced, Novoflex Flash Bracket with Two 19.5" Flexible Arms which I couldn't hardly adjust nor keep in place, I was wondering if I just dumped another 280 bucks into macro lighting gear which was going to be buried in the back of my closet along side my Pentax AF160FC Auto Macro Ring Flash and some broken Wimberley articulating flash bracket arms.
I noticed that the top of the flash unit that the modeling light and flash arms are attached to is capable of swiveling 180 degrees in either direction. Maybe further but do not want to try it and have no need to swivel it at all.
First outing was night time with pentax K5IIs body, 100mm Pentax WR Macro lens, with raynox DCR250 and raynox MSN505 diopters.
After the first few shots using it, I decided to diffuse the flash heads down more by taping some tracing paper over them. Then ran out into the dark to snap some shots of some orb weaver spiders out on their webs. The modeling light was a very nice feature. The articulation was smooth on it making me immediately wish that Venus would have used the same material on the flash arms as what was used on the modeling light. I do not know the exact name of that material but would compare it to the metal articulating material you'd find on many clip on lamps. Adjusting the brightness of the light was a breeze and I hardly ever had to take it beyond its lowest setting due to it having the reach to extend over the 100mm while it was fully extended to 1:1. I also didn't want to crank the modeling light up since I haven't diffused the lighting on it as of yet.
I was easily able to see my subject while being less than an inch away.
Adjusting the flash arms required care but I was able to achieve a wide range of movement and distance in front of and behind my subject. Luckily the flash heads hardly weigh anything so on the the plus side, the arms do not seem to have to hold up much weight. I didn't have a problem with the arms sagging or falling down though a couple of the segmented plastic joints near the flash itself feel loose in comparison to most of the other overly creeky sounding ones.
Flash brightness adjustments between left and right was as easy to manipulate as it looks in the pictures on their website. Due to how far these arms can reach out past/over/under my lenses, I hardly ever felt a need to bring the brightness beyond the third or fourth mark. These settings resulted in excellent lighting and extremely quick recycle speeds. What felt like 1/2 second . I have not tested how long it would take to run through a set of fully charged Eneloop AA batteries yet but I have shot for three to four hours and hundreds of shots per outing without having to change out so far.
Other things I should note.
Be gentle with loading and unloading the batteries. The sliding plastic outside cover requires that you press down the batteries (which are resting on fairly high tension springs) while sliding and locking the cover into place. I can see this so easily breaking if someone is being overly aggressive.
Also the arms are not something I trust in being able to fully collapse down into wedging it into ones camera bag. I'd make room for it. I am currently keeping it in a second bag by itself with the arms loosely bent over towards the front of the base of the unit.
I seriously hope this lasts for at least a few years because it is so nice to actually achieve brilliant lighting in and around leaves or branches in which my insect subjects often lurk around. I primarily prefer to snap 1X-5X without use of a tripod. It is the lightest flash setup I have used and has now replaced my previous preferred Metz 58 AF-2 mounted via Wimberley duel jointed articulating flash arm.
I'm glad I bought it though I am hoping they do more to increase the durability of this product. The performance of this flash is as advertised.
Here is some sample shots.
https://www.flickr.com/photos/76357727@N08/17661853862/in/dateposted-public/ https://www.flickr.com/photos/76357727@N08/17477960649/in/dateposted-public/ https://www.flickr.com/photos/76357727@N08/17477914139/in/dateposted-public/
I would have uploaded some samples but apparently I ran out of room to upload on this site.
I hope some of this information helps in determining whether or not this is the right flash unit for you.
---------- Post added 05-15-15 at 12:13 AM ----------
I should have added that I am more easily able to achieve desired lighting with the lowest ISO values of 80-160 while stopping down to F18-F32 using the pentax 100mm DFA WR macro lens with raynox attachments. Though I do not normally go to F32 due to diffraction. I can quickly adjust the position of the flash arms to move or eliminate certain undesirable flash hot spots.
Even though the arms currently hold their desired position the flash heads will wobble back and forth like they are on stiff springs when moving the camera but the bonus of having the lighting where I want it and as close as I need it is allowing for faster shutter speeds without inducing any additional image blur.
Since there is not a high speed sync flash option that I am aware of on this product, 1/160 sec is about the max shutter I have been able to run. That is plenty fast for me when snapping hand-held.
I am not concerned with the lack of PTL since I have always primarily manually adjusted the brightness values of previous flash units.
Last edited by Phosphene; 05-14-2015 at 10:33 PM.