Hi valery, the image is amazing. Can I ask you where the ERF comes from?
I am thinking to use a 6" RC with PST etalon but I need a large ERF, where have you found a 280 ERF? how much is the price? if it is a baader one the price should be impressive!

He contacted also me to sell a Coronado BF15, I have writted was interested but i have not received any answer yet!

Thanks to everyone for the comments. but it is hard to estimate the bandwidth from just one shot. From what I know of the optical set-up of the Quark, I would guess the bandpass depends to some extent on the focal ratio of the scope used. Maybe this has an impact on the comparison i really don't kno...

Hello to everyone, i had only several hours of free time in this weekend so I tried to do a really fast comparison among PST mod and quark cromosphere. The image has been taken on saturday through a Stellarvue 102/800. PST modification has been done using a powermate 2x in front of the etalon. I the...

Nice shots Marcello...
I have a question for you! You have used a 0.63 celestron reducer, think is the usual SC reducer, is it correct?
How have you mounted it in the optical path? The quark has only 31.8 mm eyepiece holder.

Grazie mille per la risposta e cieli sereni!

Yes ok, so this effect comes from non ideal assembly of the instrument. By the way rotating etalon could provide a one more degree of freedom to improve tuning
Where i can find a circular polarization filter? is not a standard astronomy tool....

Tilt ok, i agree affects the tuning, but rotating why should change the tuning? assuming that rotates in axes the etalon should be circular symmetric...

Hello, i am little bit late but this is an image of solar activity on 8th june...that was a very sunny day in Italy! The instrument is modified PST on a Stellarvue 102/800, I really love this telescope... with qhLii CCD camera. The mosaic has been made with seven pannels. Enjoy the view... http://as...

For sale Coronado Solarmax 40 richview etalon to use as double stack unit.
very good conditions

Price 550€ including shipping in Europe. No shipping to USA.

Tra the solution could be send it back! The real problem is people that do not have a modified pst to compare how can they prove that their quark is not working?? This is misleading advertisement they declare <0.5 but this is not and is also very difficult for the medium owner demonstrate that this ...

Interesting video! The silence of Daystar is not good...More serious the fact that on PE daystar garantees the band pass! Now i think that the only way to have an objective opinion is to measure the bandwidth of one quark... but your comparison does not leave many possibilities ;) By the way i have ...

Your comparison is impressive...
nothing to say pst modification perform much more better and this is really strange. If there is no problem in your quark unit i have to say that is not a good advertising for daystar!
By the way your pst modification is amazing

Hi two mosaics of the solar activity of 24/5/2014. The instrument used was the modified PST with 2x telecentric barlow lens, the camera a qhy5. I am pretty satisfied about this scope, it performs really well! http://astrob.in/98418/0/rawthumb/gallery/get.jpg http://astrob.in/98251/0/rawthumb/gallery...

Hello everyone, this is my first photographic test with Daystar quark cromosphere version. I have dedicated one day to test it and try to compare to PST mod, unfortunely the photographic comparison is not reliable because the quark has more or less double focal lenght of PST mod. Visual experience i...

If good price i could consider to buy a Coronado BF15, let me know if you have one!
I live in italy..

but I am a little disappointed by the result compared with the PST Mod!!!! :( , the control knob was completely turned right, maximum of contrast I have not yet found the right direction for the knob but i have the same feeling by visual observation, contrast and details are much more better throug...

My first impressions on the Quark to daystar VS PST Mod; as expected, the Quark is much less contrasted than the PST!!!

Why did you expect this?
This is also the impression i had visually..

Maybe i have solved the mystery about on band temperature... If I live the quark inside the house doesn't seem reach the right temperature of I turn the knob counterclockwise...but if I leave the quark mounted in the telescope pointing at the sun the led become green! So seems that we need the heat ...

Hello! Now the quark has arrived in Italy! I received a cromosphere version yesterday! Today the first visual test using a Stellarvue 102/800 refractor. As Erf I am using a uv/ir cut filter and I used a cheap 40 plossl eyepiece. I inserted the quark and turn the knob in the middle position and waite...

Hello to everyone! I am starting to prepare the path for the new QUARK cromosphere version...maybe I will be one of the first to receive a Quark in Italy :D I would like to have a final refractor to do solar images Halfa with PST modified and new quark and white light! For this reason i am taking a ...

Hi, i have tried to download your software and tried to use it with a camera qhy MZ5M and qhy5LII.
The software is not able to find any camera i use, the only camera in the menu is the webcam in the computer. The software is able to work with this cameras?
They have also an ascom driver...

Hi Lorenzo, for a telecentric to work properly they need to be a certain distance from the scopes focal point, and the telecentric itself has a focal 'zone' where a sharp image can be reached. I'm not convinced with the TV that there is much depth to this 'zone' and as such may struggle to get an e...

Yes this is the same configuration i used!
The powermate and both collimating lenses on the etalon!
Could you post some picture of the sun obtained with your modified pst?

i have read the new post about telecentric and your answers here! So also the rear collimating lens should be removed when telecentric system is used. Mark why do you believe powermate is not suitable for halfa work? I agree that dedicated halfa telecentric system like the baader is optimized for th...

Using a good telecentric really requires the removal of the front collimating lens of the PST assembly

Today i have tried to remove the front lens of the pst, but i was not able to reach focus in any way...

Hello i have ask some informations about your equipment in a previous post!
This image is really amazing, incredible details!!!!
What is Aries solar kit? Is it a your creation or is there some vendor that provide it?

Incredible image!!
very nice details sharp but without exaggeration, really well balanced!
Can you give us some informations about the ARIES kit? i have tried to look for some informations online but i have found no vendor!

Thanks for the welcome. So the point to remove the front collimation lens was not really clear! I will try as soon as possible! Please use my mail massimi.loreATgmail.com to send me your work! I hope there are informations to clarify this point! Why a telecentric lens makes collimating lens unuseful...

Hello, my name is Lorenzo and i am writing from Rome, Italy! In my life i am Phd student and my research field is related to surface physics. My hobby is obviously astronomy :mrgreen: i have several telescope in particular refractors dedicated to deepsky imaging. I have also a PST and i am here to h...